# Open Modular Rockbox Player ## Description Repairable open-source portable music player derived from Echo R1 for Rockbox, with Tangara-inspired smart swappable controls, a 2.4-inch display, USB-C, headphone output, and fixed line output. ## Project Details - **Owner:** iamcrsp - **Created:** 8/23/2026 - **Last Updated:** 8/23/2026 - **Visibility:** Public ## Key Components ### D1 — [USBLC6-2P6](https://www.flux.ai/lcsc/usblc6-2p6~ubvn.md) - Symbol Style: parametric-v1 - Manufacturer Name: TECH PUBLIC(台舟) - Package or Case Code: SOT-666-6_L1.6-W1.2-P0.50-LS1.6-BL - JLCPCB Part Class: Extended Part - Functional Group: USB - Role: ESD Protection - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB2 high-speed differential pair protection at connector - Part Type: ESD Protection Devices - Datasheet URL: https://www.lcsc.com/datasheet/C2827693.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNeR1VeUFNeTlhdXjsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Manufacturer Part Number: USBLC6-2P6 - LCSC Part Number: C2827693 **Pins:** - GND [pin 2] - I/O1 [pin 6] - I/O1 [pin 1] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### D2 — [PESD3V3L4UW](https://www.flux.ai/kicad-part-library/pesd3v3l4uw~6ku.md) - Package or Case Code: SOT-665 - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PESDXL4UF_G_W.pdf - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: PESD3V3L4UW - Functional Group: Storage - Role: ESD Protection - Role Details: SDMMC D0-D3 protection **Pins:** - A [pin 2] - K1 [pin 1] - K2 [pin 3] - K3 [pin 4] - K4 [pin 5] ### D3 — [PESD3V3L4UW](https://www.flux.ai/kicad-part-library/pesd3v3l4uw~6ku.md) - Functional Group: Storage - Role: ESD Protection - Role Details: SDMMC CLK CMD and card detect protection - Manufacturer Name: Texas Instruments Inc. - Package or Case Code: SOT-665 - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PESDXL4UF_G_W.pdf - Manufacturer Part Number: PESD3V3L4UW **Pins:** - A [pin 2] - K1 [pin 1] - K2 [pin 3] - K3 [pin 4] - K4 [pin 5] ### D4 — [PESD3V3L4UW](https://www.flux.ai/kicad-part-library/pesd3v3l4uw~6ku.md) - Manufacturer Part Number: PESD3V3L4UW - Functional Group: Audio - Role Details: ESD clamp for headphone L/R and fixed line-out L/R at jacks - Package or Case Code: SOT-665 - Role: Protection - Datasheet URL: https://assets.nexperia.com/documents/data-sheet/PESDXL4UF_G_W.pdf - Manufacturer Name: Texas Instruments Inc. **Pins:** - A [pin 2] - K1 [pin 1] - K2 [pin 3] - K3 [pin 4] - K4 [pin 5] ### J1 — [TYPE-C-31-M-12](https://www.flux.ai/vasy_skral/type-c-31-m-12~75f.md) - Role: External Connector - Manufacturer Name: Korean Hroparts Elec - Symbol Style: Parametric - Manufacturer Part Number: TYPE-C-31-M-12 - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: USB-C USB2 device/sink connector - Datasheet URL: https://en.krhro.com/npublic/opdfjs/web/viewer.html?file=https%3A%2F%2Fomo-oss-file.thefastfile.com%2Fportal-saas%2Fnew2023011311465142457%2Fcms%2Ffile%2F95f41c83-14fa-41cb-9f86-8d6a717317e5.pdf - Functional Group: USB **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin S3] - SHIELD [pin S1] - SHIELD [pin S4] - SHIELD [pin S2] - VBUS [pin B4A9] - VBUS [pin A4B9] ### J2 — [DM3AT-SF-PEJM5](https://www.flux.ai/adrian95/dm3at-sf-pejm5~p1p.md) - Role: Storage Connector - Functional Group: Storage - Role Details: Single Phase-1 microSD; SD_CARD_DETECT_N relocated to STM32 PC13. Socket is continuously powered from 3V3 with local bypass; no load-switch isolation, so hot insertion relies on SDMMC sequencing and ESD protection. - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Datasheet URL: https://www.mouser.com/datasheet/2/185/DM3AT_SF_PEJM5_CL0609_0031_0_00_2DDrawing_00009471-1614303.pdf - Manufacturer Part Number: DM3AT-SF-PEJM5 - Manufacturer Name: Hirose Electric Co Ltd - Symbol Style: parametric-v1 **Pins:** - ~ [pin SWA] - ~ [pin SWB] - CD/DAT3 [pin 2] - CLK [pin 5] - CMD [pin 3] - DAT0 [pin 7] - DAT1 [pin 8] - DAT2 [pin 1] - SHIELD [pin P3] - SHIELD [pin P4] - SHIELD [pin P1] - SHIELD [pin P2] - VDD [pin 4] - VSS [pin 6] ### J3 — [5051103591](https://www.flux.ai/adrian95/5051103591~u13.md) - Role: Display Connector - Manufacturer Part Number: 5051103591 - Role Details: PROVISIONAL 35-position connector. Conflict-free 16-bit RGB mapping exposes R0-R5, G2-G5, B0-B5 plus timing/control; pins 25/26 (G1/G0) are explicit NC because no conflict-free LTDC mapping remains with mandatory FMC/ULPI. Exact panel/FPC, logic levels, control protocol, and LED-anode pins remain unverified. - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1187/FFC-FPC_Connectors.pdf - Functional Group: Display - Manufacturer Name: Molex **Pins:** - 1 [pin 1] - 10 [pin 10] - 11 [pin 11] - 12 [pin 12] - 13 [pin 13] - 14 [pin 14] - 15 [pin 15] - 16 [pin 16] - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 2 [pin 2] - 20 [pin 20] - 21 [pin 21] - 22 [pin 22] - 23 [pin 23] - 24 [pin 24] - 25 [pin 25] - 26 [pin 26] - 27 [pin 27] - 28 [pin 28] - 29 [pin 29] - 3 [pin 3] - 30 [pin 30] - 31 [pin 31] - 32 [pin 32] - 33 [pin 33] - 34 [pin 34] - 35 [pin 35] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] - 9 [pin 9] - MP1 [pin MP1] - MP2 [pin MP2] ### J4 — [SJ-3506-SMT-TR](https://www.flux.ai/adrian95/sj-3506-smt-tr~pnu.md) - Manufacturer Name: CUI Devices - Manufacturer Part Number: SJ-3506-SMT-TR - Datasheet URL: https://www.cuidevices.com/product/resource/sj-3506-smt-tr.pdf - Functional Group: Audio - Part Type: Connector - Role: Headphone Output - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: AC-coupled volume-controlled 3.5mm TRS headphone output; isolated normally-open switch provides HEADPHONE_DETECT_N on STM32 PC4 **Pins:** - IRSWITCH [pin 5] - ISOLATED_RING [pin 4] - RING [pin 3] - SHIELDING [pin S2] - SHIELDING [pin S1] - SLEEVE [pin 1] - TIP [pin 2] - TIP_SWITCH [pin 6] ### J5 — [SJ2-3593D-SMT-TR](https://www.flux.ai/moshtey/sj2-3593d-smt-tr~yy.md) - Functional Group: Audio - Manufacturer Part Number: SJ2-3593D-SMT-TR - Manufacturer Name: Texas Instruments Inc. - Role: Line Output - Role Details: AC-coupled fixed-level unbalanced 3.5mm TRS line output driven from codec HPLCOM/HPRCOM high-power outputs; switch contacts unused **Pins:** - RING [pin 3] - RING_SWITCH [pin 11] - SLEEVE [pin 1] - TIP [pin 2] - TIP_SWITCH [pin 10] ### J6 — [S3B-PH-SM4-TB(LF)(SN)](https://www.flux.ai/adrian95/s3b-ph-sm4-tblfsn~q3c.md) - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Role Details: Pin allocation BAT+, NTC, GND; pack mating details TBD - Manufacturer Part Number: S3B-PH-SM4-TB(LF)(SN) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role: Battery Connector - Functional Group: Power - Manufacturer Name: JST Sales America Inc. - Symbol Style: parametric-v1 **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] ### J7 — [FTSH-103-01-L-DV](https://www.flux.ai/cherepanyadima/ftsh-103-01-l-dv~u9.md) - Role Details: SWDIO SWCLK SWO NRST VTREF GND - Manufacturer Name: Samtec - Functional Group: Debug - Part Type: Connector - Manufacturer Part Number: FTSH-103-01-L-DV - Role: Debug Connector - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] ### SW1 — [PEC11J-9015F-S0024](https://www.flux.ai/adrian95/pec11j-9015f-s0024.md) - Datasheet URL: https://bourns.com/docs/product-datasheets/pec11j.pdf - Manufacturer Name: Bourns - Role: Volume Control - Package or Case Code: TO - Functional Group: Controls - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: PEC11J-9015F-S0024 - Role Details: Encoder A/B plus momentary mute push - Part Type: Sensor **Pins:** - CHANNEL_A [pin A1] - CHANNEL_B [pin B1] - CHANNEL_C [pin C1] - COM [pin D1] - MP1 [pin MP1] - MP2 [pin MP2] - MP3 [pin MP3] - MP4 [pin MP4] - MP5 [pin MP5] - MP6 [pin MP6] - NO [pin E1] ### SW10 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Part Type: Switch - LCSC Part Number: C221896 - Functional Group: Controls - Manufacturer Name: C&K - Manufacturer Part Number: PTS810SJK250SMTRLFS - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role Details: BUTTON_Y active-low - Role: Button **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW11 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Functional Group: Controls - Part Type: Switch - LCSC Part Number: C221896 - Role: Button - Role Details: BUTTON_START active-low - Manufacturer Name: C&K - Manufacturer Part Number: PTS810SJK250SMTRLFS **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW12 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Manufacturer Part Number: PTS810SJK250SMTRLFS - Manufacturer Name: C&K - Role Details: BUTTON_SELECT active-low - Functional Group: Controls - Role: Button - Part Type: Switch - LCSC Part Number: C221896 **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW13 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role Details: NRST to ground - Part Type: Switch - LCSC Part Number: C221896 - Role: Reset Button - Manufacturer Name: C&K - Functional Group: Debug - Manufacturer Part Number: PTS810SJK250SMTRLFS **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW2 — [MHS12204](https://www.flux.ai/adrian95/mhs12204~ask.md) - Symbol Style: parametric-v1 - Functional Group: Controls - Role Details: SPDT test switch: VSYS-to-SYSTEM_ENABLE ON and GND OFF for TPS63802. Separate MCU HOLD state is not implemented by this switch; HOLD architecture remains unresolved. - Manufacturer Name: TE Connectivity ALCOSWITCH Switches - Part Type: Switch - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1308111-1_SWITCHES_CORE_PROGRAM_CATALOG&DocType=CS&DocLang=English - Manufacturer Part Number: MHS12204 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Power Hold Control **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - MH1 [pin MH1] - MH2 [pin MH2] ### SW3 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role: Button - Role Details: DPAD_UP active-low - LCSC Part Number: C221896 - Part Type: Switch - Manufacturer Name: C&K - Manufacturer Part Number: PTS810SJK250SMTRLFS - Functional Group: Controls **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW4 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Functional Group: Controls - Role: Button - Part Type: Switch - LCSC Part Number: C221896 - Manufacturer Name: C&K - Role Details: DPAD_DOWN active-low - Manufacturer Part Number: PTS810SJK250SMTRLFS **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW5 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Part Type: Switch - Role: Button - LCSC Part Number: C221896 - Manufacturer Part Number: PTS810SJK250SMTRLFS - Manufacturer Name: C&K - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Functional Group: Controls - Role Details: DPAD_LEFT active-low **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW6 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role Details: DPAD_RIGHT active-low - Role: Button - Part Type: Switch - LCSC Part Number: C221896 - Functional Group: Controls - Manufacturer Part Number: PTS810SJK250SMTRLFS - Manufacturer Name: C&K **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW7 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Functional Group: Controls - Manufacturer Part Number: PTS810SJK250SMTRLFS - Manufacturer Name: C&K - Part Type: Switch - Role: Button - LCSC Part Number: C221896 - Role Details: BUTTON_A active-low - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW8 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - LCSC Part Number: C221896 - Part Type: Switch - Role: Button - Manufacturer Name: C&K - Manufacturer Part Number: PTS810SJK250SMTRLFS - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role Details: BUTTON_B active-low - Functional Group: Controls **Pins:** - P1 [pin 1] - P3 [pin 3] ### SW9 — [PTS810SJK250SMTRLFS](https://www.flux.ai/jharwinbarrozo/pts810sjk250smtrlfs~6tl.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1810121650_C-K-PTS810SJK250SMTRLFS_C221896.pdf - Role: Button - Functional Group: Controls - Role Details: BUTTON_X active-low - Manufacturer Part Number: PTS810SJK250SMTRLFS - Manufacturer Name: C&K - LCSC Part Number: C221896 - Part Type: Switch **Pins:** - P1 [pin 1] - P3 [pin 3] ### TP1 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Role: Test Point - Role Details: 3V3 rail - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Harwin Inc. - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Functional Group: Debug - Manufacturer Part Number: S2761-46R - Part Type: Test Point **Pins:** - ~ [pin 1] ### TP2 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Role Details: 1V8 rail - Manufacturer Name: Harwin Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Role: Test Point - Part Type: Test Point - Functional Group: Debug - Manufacturer Part Number: S2761-46R **Pins:** - ~ [pin 1] ### TP3 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Role Details: VBAT rail - Manufacturer Part Number: S2761-46R - Part Type: Test Point - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - License: https://creativecommons.org/licenses/by/4.0/ - Role: Test Point - Manufacturer Name: Harwin Inc. - Functional Group: Debug **Pins:** - ~ [pin 1] ### TP4 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: NRST - Manufacturer Name: Harwin Inc. - Functional Group: Debug - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Role: Test Point - Part Type: Test Point - Manufacturer Part Number: S2761-46R **Pins:** - ~ [pin 1] ### TP5 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Functional Group: Debug - Part Type: Test Point - Manufacturer Part Number: S2761-46R - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Role Details: BOOT0 - License: https://creativecommons.org/licenses/by/4.0/ - Role: Test Point - Manufacturer Name: Harwin Inc. **Pins:** - ~ [pin 1] ### TP6 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Manufacturer Name: Harwin Inc. - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: GND rail - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Role: Test Point - Part Type: Test Point - Functional Group: Debug - Manufacturer Part Number: S2761-46R **Pins:** - ~ [pin 1] ### TP7 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Part Type: Test Point - Role Details: VSYS rail - Manufacturer Part Number: S2761-46R - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Role: Test Point - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Harwin Inc. - Functional Group: Debug **Pins:** - ~ [pin 1] ### TP8 — [S2761-46R](https://www.flux.ai/silicon-yard/s2761-46r.md) - Role Details: USB_VBUS rail - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Harwin Inc. - Role: Test Point - Datasheet URL: https://www.harwin.com/api/download/datasheet/S2761-46R - Functional Group: Debug - Manufacturer Part Number: S2761-46R - Part Type: Test Point **Pins:** - ~ [pin 1] ### U1 — [STM32H743IGT6](https://www.flux.ai/lcsc/stm32h743igt6~otpz.md) - Part Type: ST Microelectronics - Manufacturer Name: ST(意法半导体) - LCSC Part Number: C730182 - Role: Main Processor - Package or Case Code: LQFP-176_L24.0-W24.0-P0.50-LS26.0-BL - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-STM32H743IGT6_C730182.pdf - Role Details: STM32H743 Echo R1 Rockbox target, LQFP-176 - Product Info Url: https://lcsc.com/product-detail/Pre-ordered-MCUs_STMicroelectronics-STM32H743IGT6_C730182.html - Manufacturer Part Number: STM32H743IGT6 - JLCPCB Part Class: Extended Part - Functional Group: MCU Core **Pins:** - BOOT0 [pin 166] - NRST [pin 31] - PA0 [pin 40] - PA1 [pin 41] - PA10 [pin 121] - PA11 [pin 122] - PA12 [pin 123] - PA13 [pin 124] - PA14 [pin 137] - PA15 [pin 138] - PA2 [pin 42] - PA3 [pin 47] - PA4 [pin 50] - PA5 [pin 51] - PA6 [pin 52] - PA7 [pin 53] - PA8 [pin 119] - PA9 [pin 120] - PB0 [pin 56] - PB1 [pin 57] - PB10 [pin 79] - PB11 [pin 80] - PB12 [pin 92] - PB13 [pin 93] - PB14 [pin 94] - PB15 [pin 95] - PB2 [pin 58] - PB3 [pin 161] - PB4 [pin 162] - PB5 [pin 163] - PB6 [pin 164] - PB7 [pin 165] - PB8 [pin 167] - PB9 [pin 168] - PC0 [pin 32] - PC1 [pin 33] - PC10 [pin 139] - PC11 [pin 140] - PC12 [pin 141] - PC13 [pin 8] - PC14-OSC32_IN [pin 9] - PC15-OSC32_OUT [pin 10] - PC2_C [pin 34] - PC3_C [pin 35] - PC4 [pin 54] - PC5 [pin 55] - PC6 [pin 115] - PC7 [pin 116] - PC8 [pin 117] - PC9 [pin 118] - PD0 [pin 142] - PD1 [pin 143] - PD10 [pin 98] - PD11 [pin 99] - PD12 [pin 100] - PD13 [pin 101] - PD14 [pin 104] - PD15 [pin 105] - PD2 [pin 144] - PD3 [pin 145] - PD4 [pin 146] - PD5 [pin 147] - PD6 [pin 150] - PD7 [pin 151] - PD8 [pin 96] - PD9 [pin 97] - PDR_ON [pin 171] - PE0 [pin 169] - PE1 [pin 170] - PE10 [pin 73] - PE11 [pin 74] - PE12 [pin 75] - PE13 [pin 76] - PE14 [pin 77] - PE15 [pin 78] - PE2 [pin 1] - PE3 [pin 2] - PE4 [pin 3] - PE5 [pin 4] - PE6 [pin 5] - PE7 [pin 68] - PE8 [pin 69] - PE9 [pin 70] - PF0 [pin 16] - PF1 [pin 17] - PF10 [pin 28] - PF11 [pin 59] - PF12 [pin 60] - PF13 [pin 63] - PF14 [pin 64] - PF15 [pin 65] - PF2 [pin 18] - PF3 [pin 19] - PF4 [pin 20] - PF5 [pin 21] - PF6 [pin 24] - PF7 [pin 25] - PF8 [pin 26] - PF9 [pin 27] - PG0 [pin 66] - PG1 [pin 67] - PG10 [pin 153] - PG11 [pin 154] - PG12 [pin 155] - PG13 [pin 156] - PG14 [pin 157] - PG15 [pin 160] - PG2 [pin 106] - PG3 [pin 107] - PG4 [pin 108] - PG5 [pin 109] - PG6 [pin 110] - PG7 [pin 111] - PG8 [pin 112] - PG9 [pin 152] - PH0-OSC_IN [pin 29] - PH1-OSC_OUT [pin 30] - PH10 [pin 87] - PH11 [pin 88] - PH12 [pin 89] - PH13 [pin 128] - PH14 [pin 129] - PH15 [pin 130] - PH2 [pin 43] - PH3 [pin 44] - PH4 [pin 45] - PH5 [pin 46] - PH6 [pin 83] - PH7 [pin 84] - PH8 [pin 85] - PH9 [pin 86] - PI0 [pin 131] - PI1 [pin 132] - PI10 [pin 12] - PI11 [pin 13] - PI2 [pin 133] - PI3 [pin 134] - PI4 [pin 173] - PI5 [pin 174] - PI6 [pin 175] - PI7 [pin 176] - PI8 [pin 7] - PI9 [pin 11] - VBAT [pin 6] - VCAP [pin 81] - VCAP [pin 125] - VDD [pin 49] - VDD [pin 91] - VDD [pin 36] - VDD [pin 172] - VDD [pin 15] - VDD [pin 72] - VDD [pin 159] - VDD [pin 127] - VDD [pin 149] - VDD [pin 136] - VDD [pin 82] - VDD [pin 103] - VDD [pin 62] - VDD [pin 23] - VDD33USB [pin 114] - VDDA [pin 39] - VREF+ [pin 38] - VSS [pin 126] - VSS [pin 148] - VSS [pin 113] - VSS [pin 61] - VSS [pin 22] - VSS [pin 90] - VSS [pin 102] - VSS [pin 135] - VSS [pin 14] - VSS [pin 48] - VSS [pin 71] - VSS [pin 158] - VSSA [pin 37] ### U2 — [W9825G6KH-5I](https://www.flux.ai/silicon-yard/w9825g6kh-5i.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/83141030836f93d4f9301ac7fe47f392108610e6a38ca7b85e22811ee87ccbfd.pdf - Role Details: 256 Mbit x16 SDR SDRAM for STM32 FMC at 120 MHz - Functional Group: MCU Core - Manufacturer Part Number: W9825G6KH-5I - Package or Case Code: TSOP - Symbol Style: parametric-v1 - Part Type: Integrated Circuits - Role: Working Memory - Manufacturer Name: Winbond **Pins:** - ~CAS [pin 17] - ~CS [pin 19] - ~RAS [pin 18] - ~WE [pin 16] - A0 [pin 23] - A1 [pin 24] - A10/AP [pin 22] - A11 [pin 35] - A12 [pin 36] - A2 [pin 25] - A3 [pin 26] - A4 [pin 29] - A5 [pin 30] - A6 [pin 31] - A7 [pin 32] - A8 [pin 33] - A9 [pin 34] - BS0 [pin 20] - BS1 [pin 21] - CKE [pin 37] - CLK [pin 38] - DQ0 [pin 2] - DQ1 [pin 4] - DQ10 [pin 45] - DQ11 [pin 47] - DQ12 [pin 48] - DQ13 [pin 50] - DQ14 [pin 51] - DQ15 [pin 53] - DQ2 [pin 5] - DQ3 [pin 7] - DQ4 [pin 8] - DQ5 [pin 10] - DQ6 [pin 11] - DQ7 [pin 13] - DQ8 [pin 42] - DQ9 [pin 44] - LDQM [pin 15] - NC [pin 40] - UDQM [pin 39] - VDD_1 [pin 1] - VDD_2 [pin 14] - VDD_3 [pin 27] - VDDQ_1 [pin 3] - VDDQ_2 [pin 9] - VDDQ_3 [pin 43] - VDDQ_4 [pin 49] - VSS_1 [pin 28] - VSS_2 [pin 41] - VSS_3 [pin 54] - VSSQ_1 [pin 6] - VSSQ_2 [pin 12] - VSSQ_3 [pin 46] - VSSQ_4 [pin 52] ### U3 — [USB3320C-EZK](https://www.flux.ai/adrian95/usb3320c-ezk~0s.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Name: Microchip Technology - Manufacturer Part Number: USB3320C-EZK - Role: USB PHY - Role Details: Echo-compatible ULPI high-speed transceiver - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/00001792E.pdf - Functional Group: USB **Pins:** - CLKOUT [pin 14] - CPEN [pin 3] - DATA0 [pin 24] - DATA1 [pin 23] - DATA2 [pin 22] - DATA3 [pin 21] - DATA4 [pin 20] - DATA5 [pin 19] - DATA6 [pin 18] - DATA7 [pin 17] - DIR [pin 12] - DM [pin 8] - DP [pin 7] - EXTVBUS [pin 10] - GND [pin 1] - GND [pin 2] - GND [pin 33] - ID [pin 5] - NXT [pin 11] - RBIAS [pin 32] - REG_EN [pin 31] - RESET [pin 9] - STP [pin 13] - VBUS [pin 4] - VDD1.8 [pin 15] - VDD1.8 [pin 26] - VDD3.3 [pin 30] - VDD3.3 [pin 6] - VDD3.3 [pin 25] - VDD3.3 [pin 16] - VDDA1.8 [pin 29] - XI [pin 28] - XO [pin 27] ### U4 — [TLV320AIC3104IRHBR](https://www.flux.ai/lcsc/tlv320aic3104irhbr~ubry.md) - Part Type: Audio Power OpAmps - Product Info Url: https://lcsc.com/product-detail/Audio-OpAmps_TI_TLV320AIC3104IRHBR_TLV320AIC3104IRHBR_C181753.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2410010331_Texas-Instruments-TLV320AIC3104IRHBR_C181753.pdf - Role: Audio Codec - LCSC Part Number: C181753 - Functional Group: Audio - Role Details: I2S/I2C codec; HPLOUT/HPROUT drive volume-controlled AC-coupled headphones, HPLCOM/HPRCOM are firmware-configured as fixed-level single-ended stereo line outputs; differential line drivers unused - Package or Case Code: HVQFN-32_L5.0-W5.0-P0.50-TL-EP - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: TLV320AIC3104IRHBR - JLCPCB Part Class: Extended Part **Pins:** - ~{RESET} [pin 31] - AVDD [pin 25] - AVSS1 [pin 17] - AVSS2 [pin 26] - BCLK [pin 2] - DIN [pin 4] - DOUT [pin 5] - DRVDD [pin 24] - DRVDD [pin 18] - DRVSS [pin 21] - DVDD [pin 32] - DVSS [pin 6] - EP [pin 33] - HPLCOM [pin 20] - HPLOUT [pin 19] - HPRCOM [pin 22] - HPROUT [pin 23] - IOVDD [pin 7] - LEFT_LOM [pin 28] - LEFT_LOP [pin 27] - MCLK [pin 1] - MIC1LM/LINE1LM [pin 11] - MIC1LP/LINE1LP [pin 10] - MIC1RM/LINE1RM [pin 13] - MIC1RP/LINE1RP [pin 12] - MIC2L/LINE2L/MICDET [pin 14] - MIC2R/LINE2R [pin 16] - MICBIAS [pin 15] - RIGHT_LOM [pin 30] - RIGHT_LOP [pin 29] - SCL [pin 8] - SDA [pin 9] - WCLK [pin 3] ### U5 — [BQ24074RGTT](https://www.flux.ai/lcsc/bq24074rgtt~fpyl.md) - Role: Power Path Charger - Operating Temperature: -40 to 85°C - Part Type: Battery Management ICs - Package or Case Code: VQFN-16_L3.0-W3.0-P0.50-TL-EP1.7 - Operating Voltage: IN operating range 4.35–10.2 V for BQ24074; IN withstand/recommended range up to 26 V, abs max 28 V - LCSC Part Number: C2861252 - License: https://creativecommons.org/licenses/by/4.0/ - JLCPCB Part Class: Extended Part - Role Details: 1.3A input limit target, 800mA charge target; calculated peak system input 1.24A - Datasheet URL: https://www.ti.com/lit/ds/symlink/bq24074.pdf - Implementation Details: Standalone single-cell Li-Ion/Li-Polymer linear charger and power-path management IC; 4.2 V battery regulation, 4.4 V OUT regulation, 10.5 V OVP, 1.5 A programmable fast charge/input current limit. - Manufacturer Name: Texas Instruments - Package: VQFN-16 RGT (3 mm × 3 mm) with exposed thermal pad - Symbol Style: parametric-v1 - Functional Group: Power - Manufacturer Part Number: BQ24074RGTT **Pins:** - ~{CE} [pin 4] - ~{CHG} [pin 9] - ~{PGOOD} [pin 7] - BAT [pin 2] - BAT [pin 3] - EN1 [pin 6] - EN2 [pin 5] - EP [pin 17] - ILIM [pin 12] - IN [pin 13] - ISET [pin 16] - ITERM [pin 15] - OUT [pin 11] - OUT [pin 10] - TMR [pin 14] - TS [pin 1] - VSS [pin 8] ### U6 — [TPS63802DLAR](https://www.flux.ai/lcsc/tps63802dlar~f4j8.md) - Symbol Style: parametric-v1 - Role: 3V3 Regulator - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps63802.pdf - JLCPCB Part Class: Extended Part - LCSC Part Number: C2845237 - Operating Temperature: -40℃~+125℃@(TJ) - Package or Case Code: VSON-10_L3.0-W2.0-P0.50-TL - Frequency: 2.1MHz;1.4MHz;1.6MHz - Role Details: TPS63802 3.3V buck-boost; 0.47uH XFL4015-471MEC, 511k/91k feedback, 100k PG pull-up, PG to STM32 PI1 - Manufacturer Name: TI(德州仪器) - Output Current: 2A - Part Type: DC-DC Converters - Max Input Voltage: 1.3~5.5V - Manufacturer Part Number: TPS63802DLAR - Functional Group: Power **Pins:** - AGND [pin 3] - EN [pin 1] - FB [pin 4] - GND [pin 8] - L1 [pin 9] - L2 [pin 7] - MODE [pin 2] - PG [pin 5] - VIN [pin 10] - VOUT [pin 6] ### U7 — [TPS62A02ADRLR](https://www.flux.ai/silicon-yard/tps62a02adrlr.md) - Symbol Style: parametric-v1 - Functional Group: Power - Package or Case Code: SOT-563 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/4984fc371cd8aa730d9b1419ab4ac7bbddb0446798a6d993e58c408a41473147.pdf - Role Details: TPS62A02A DRL, 1.8V via 200k/100k divider, 1uH, 4.7uF input and 22uF output - Role: 1V8 Regulator - Manufacturer Part Number: TPS62A02ADRLR - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - EN [pin 4] - FB [pin 5] - GND [pin 1] - PG [pin 6] - SW [pin 2] - VIN [pin 3] ### U8 — [AP2502KTR-G1](https://www.flux.ai/adrian95/ap2502ktr-g1~4g6.md) - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: AP2502KTR-G1 - Role Details: Four-channel linear sink; LCD panel pinout assumption follows Echo Rev1.1 connector - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP2502.pdf - Role: Backlight Driver - Functional Group: Display - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - EN [pin 1] - GND [pin 2] - LED1 [pin 6] - LED2 [pin 5] - LED3 [pin 4] - LED4 [pin 3] ### Y1 — [ABM8G-24.000MHZ-18-D2Y-T](https://www.flux.ai/adrian95/abm8g-24p000mhz-18-d2y-t.md) - Part Type: Crystals and Oscillators - Capacitance: 18pF - Mount: Surface Mount - Symbol Style: parametric-v1 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/0c496f4a39367786dc352f3582c31ce4b6a9d5a5168ee71ac3e8bab47549838e.pdf - Role Details: 24MHz HSE; load capacitors to be calculated for 18pF CL - Frequency: 24MHz - Resistance: 60ohms - Manufacturer Part Number: ABM8G-24.000MHZ-18-D2Y-T - Role: Clock - Implementation Details: Fundamental mode, ±30ppm stability, 10uW typ / 100uW max drive, 3.2x2.5x1.0mm ABM8G 4-SMD package - Manufacturer Name: Abracon LLC - Functional Group: MCU Core - Operating Temperature: -40 to 85°C - License: https://creativecommons.org/licenses/by/4.0/ - Tolerance: 20ppm - Package or Case Code: SMD **Pins:** - GND_1 [pin 2] - GND_2 [pin 4] - XTAL_1 [pin 1] - XTAL_2 [pin 3] ### Y2 — [830050789](https://www.flux.ai/adrian95/830050789~s9a.md) - Manufacturer Part Number: 830050789 - Role: RTC Clock - Functional Group: MCU Core - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth Elektronik - Role Details: 12.5pF load watch crystal - Datasheet URL: https://www.we-online.com/components/products/datasheet/830050789.pdf - Part Type: Oscillator **Pins:** - 1 [pin 1] - 2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/iamcrsp/open-modular-rockbox-player~uj](https://www.flux.ai/iamcrsp/open-modular-rockbox-player~uj).* --- *Generated from [https://www.flux.ai/iamcrsp/open-modular-rockbox-player~uj](https://www.flux.ai/iamcrsp/open-modular-rockbox-player~uj)*