# DeltaTap V1 Digital Interface ## Description Preliminary 22 × 25 mm nRF54LM20A\-QGAA digital/interface board for host and PAW3395 SPI interception, bypass, power isolation, and SWD access\. RF and package\-specific support circuitry are intentionally left TBD pending public QGAA evidence\. ## Project Details - **Owner:** gamerman12 - **Created:** 8/25/2026 - **Last Updated:** 8/31/2026 - **Visibility:** Public ## Key Components ### FB1 — [Generic Inductor](https://flux.ai/jharwinbarrozo/generic-inductor~wlv.md) - Role Details: Official PAAA 120Ω@100MHz, 200mA, 500mΩ max ferrite bead - Package: SMD\_0201\_0603Metric - Part Type: Inductor - Functional Group: PAAA Power Support - Manufacturer Name: Murata - Inductance: 120Ω @ 100MHzH - Role: Filter - Manufacturer Part Number: BLM03AG121SN1D - Current Rating: 200mA **Pins:** - P1 [pin 1] - P2 [pin 2] ### J2 — [B6B\-PH\-K\-S\(LF\)\(SN\)](https://flux.ai/adrian95/b6b-ph-k-slfsn~nsa.md) - Role: Mouse Harness - Connector Positions: 6 - Symbol Style: parametric\-v1 - Part Type: Connector - Connector Type: Wire\-to\-board, vertical/top\-entry, through\-hole - Manufacturer Name: JST - Datasheet URL: https://www\.jst\-mfg\.com/product/pdf/eng/ePH\.pdf - Manufacturer Part Number: B6B\-PH\-K\-S\(LF\)\(SN\) - License: https://creativecommons\.org/licenses/by/4\.0/ - Functional Group: Mouse Button Harness - Connector Pitch: 2\.00 mm - Role Details: JST PH 6\-position top\-entry through\-hole mouse harness; mounting height about 8 mm; cable mates/exits normal to PCB \(\+Z\); pin 1 silkscreen\-marked\. **Pins:** - Pin\_1 [pin 1] - Pin\_2 [pin 2] - Pin\_3 [pin 3] - Pin\_4 [pin 4] - Pin\_5 [pin 5] - Pin\_6 [pin 6] ### J3 — [U\.FL\-R\-SMT\-1](https://flux.ai/vasy_skral/ufl-r-smt-1~yly.md) - Role: RF Tuning / Matching - Manufacturer Name: HRS - Manufacturer Part Number: U\.FL\-R\-SMT\-1\(80\) - Functional Group: PAAA RF Support - Part Type: Connector - Role Details: W3921B0100 external FPC antenna connector\. Footprint geometry was read back against Hirose CL0331\-0472\-2\-80: center/bottom 1\.00×1\.05 mm land is SIG; two 1\.05×2\.20 mm side lands are GND\. - Datasheet URL: https://www\.hirose\.com/product/document?clcode=CL0331\-0472\-2\-80&productname=U\.FL\-R\-SMT\-1\(80\)&series=U\.FL&documenttype=2DDrawing&lang=en&documentid=0001257922 **Pins:** - 1 [pin 1] - 2 [pin 2\-1] - 3 [pin 2\-2] ### U1 — nRF54LM20A\-PAAA - Software: Revision 1 PAAA\-B00: apply anomaly 54 SDO known\-state workaround for SPIS00; apply SPIM anomaly 8 workaround when CPHA=0 and PRESCALER\>2; account for anomaly 104 transient P1 analog\-pin shorts during power\-on reset\. No blanket SPI00/radio prohibition\. - Manufacturer Name: Nordic Semiconductor - Part Type: Integrated Circuits - Mount: Wire - Compliance: FCC - Role: Switching - Package or Case Code: FCCSP - Datasheet URL: https://docs\-be\.nordicsemi\.com/bundle/ps\_nrf54LM20A/page/pdf/nRF54LM20A\_nRF54LM20B\_Preliminary\_Datasheet\_v0\.8\.pdf - Functional Group: MCU / Intercept Core - Role Details: Host\-facing SPIS00 on P2\.01/P2\.02/P2\.04/P2\.05; PAW\-facing SPIM23 on P1\.03/P1\.04/P1\.05/P1\.06; official PAAA Config 1 power, clock and RF support\. - Manufacturer Part Number: nRF54LM20A\-PAAA - Operating Voltage: 1\.7\-3\.6 V; powered from MOUSE\_VDD nominal 1\.98 V - Frequency: 128MHz **Pins:** - ANT [pin E1] - D\- [pin K4] - D\+ [pin K5] - DCC [pin A5] - DECA [pin A8] - DECD [pin A6] - DECRF [pin C1] - DECUSB [pin K6] - nRESET [pin F2] - P0\.00 [pin K3] - P0\.01 [pin K2] - P0\.02 [pin J3] - P0\.03 [pin J2] - P0\.04 [pin J1] - P0\.05 [pin H3] - P0\.06 [pin H2] - P0\.07 [pin G3] - P0\.08 [pin F3] - P0\.09 [pin E3] - P1\.00 [pin K8] - P1\.01 [pin J6] - P1\.02 [pin J7] - P1\.03 [pin H9] - P1\.04 [pin J9] - P1\.05 [pin H8] - P1\.06 [pin J8] - P1\.07 [pin G8] - P1\.08 [pin F8] - P1\.09 [pin E8] - P1\.10 [pin D5] - P1\.11 [pin C5] - P1\.12 [pin C4] - P1\.13 [pin C3] - P1\.14 [pin C2] - P1\.15 [pin B2] - P1\.16 [pin B3] - P1\.17 [pin B4] - P1\.18 [pin B5] - P1\.19 [pin B6] - P1\.20 [pin C6] - P1\.21 [pin C7] - P1\.22 [pin D6] - P1\.23 [pin B7] - P1\.24 [pin D7] - P1\.25 [pin E7] - P1\.26 [pin B8] - P1\.27 [pin C8] - P1\.28 [pin D8] - P1\.29 [pin H10] - P1\.30 [pin J10] - P1\.31 [pin K9] - P2\.00 [pin B10] - P2\.01 [pin C10] - P2\.02 [pin D10] - P2\.03 [pin E10] - P2\.04 [pin F10] - P2\.05 [pin G9] - P2\.06 [pin B9] - P2\.07 [pin C9] - P2\.08 [pin D9] - P2\.09 [pin E9] - P2\.10 [pin F9] - P3\.00 [pin H7] - P3\.01 [pin H6] - P3\.02 [pin H5] - P3\.03 [pin H4] - P3\.04 [pin J4] - P3\.05 [pin G7] - P3\.06 [pin G6] - P3\.07 [pin G5] - P3\.08 [pin G4] - P3\.09 [pin F7] - P3\.10 [pin F4] - P3\.11 [pin E4] - P3\.12 [pin D4] - SWDCLK [pin G1] - SWDIO [pin G2] - TXRTUNE [pin J5] - VBUS [pin K7] - VDD [pin H1] - VDD [pin A4] - VDD [pin G10] - VDD [pin A3] - VDD [pin A9] - VSS [pin D2] - VSS [pin F1] - VSS [pin F6] - VSS [pin E5] - VSS [pin F5] - VSS [pin A10] - VSS [pin E6] - VSS [pin A7] - VSS [pin D1] - VSS [pin K10] - VSS [pin A1] - VSS [pin K1] - XC1 [pin A2] - XC2 [pin B1] ### U6 — [GLF1100\-T1G7](https://flux.ai/silicon-yard/glf1100-t1g7~ms.md) - Manufacturer Name: GLF Integrated Power - Functional Group: Power Isolation - Symbol Style: parametric\-v1 - Part Type: Integrated Circuit - Role Details: MOUSE\_VDD to PAW\_VDD\_ISO; active\-high POWER\_ISO\_EN with output discharge - License: https://creativecommons\.org/licenses/by/4\.0/ - Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/4b9161ca110a5288e5486bea27533a42c026affe6c1023e6a8e26c9d6d04369a\.pdf - Manufacturer Part Number: GLF1100\-T1G7 - Role: Isolation **Pins:** - EN [pin 4] - GND [pin 2] - NC [pin 3] - VIN [pin 5] - VOUT [pin 1] ### Y1 — [CX2016DB32000D0WZRC1](https://flux.ai/jecstronic/cx2016db32000d0wzrc1~ye9.md) - Role: Timing - Datasheet URL: https://ele\.kyocera\.com/assets/products/crystal\-device/cx2016db\_e\.pdf - Part Type: Oscillator - License: https://creativecommons\.org/licenses/by/4\.0/ - Functional Group: PAAA Clocks - Manufacturer Name: KYOCERA AVX - Manufacturer Part Number: CX2016DB32000D0WZRC1 - Role Details: Official PAAA X1: 32MHz, CL=8pF, total ±40ppm - Frequency: 32000kHz **Pins:** - CRYSTAL\_\_1 [pin 1] - CRYSTAL\_\_2 [pin 3] - GND\_1 [pin 2] - GND\_2 [pin 4] ### Y2 — 9HT11\-32\.768KDZC\-T - Manufacturer Name: TXC Corporation - Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/234ee1abe089fd040d9025e1fd0a1378555cf672e5cda5627f50ae343226d0d4\.pdf - Role: Timing - Package or Case Code: SMD - Mount: Surface Mount - Functional Group: PAAA Clocks - Manufacturer Part Number: 9HT11\-32\.768KDZC\-T - Part Type: Crystals and Oscillators - Role Details: Official PAAA X2: 32\.768kHz, CL=9pF, ±20ppm - Frequency: 32\.768kHz **Pins:** - XTAL1 [pin 1] - XTAL2 [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/gamerman12/deltatap\-v1\-digital\-interface\~2g](https://flux.ai/gamerman12/deltatap-v1-digital-interface~2g).* --- *Generated from [https://flux\.ai/gamerman12/deltatap\-v1\-digital\-interface\~2g](https://flux.ai/gamerman12/deltatap-v1-digital-interface~2g)*