Part Datasheet Review and Validation
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Make the functional group more general.
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Add a Section property to all pins, and apply the same value used in the Pin Group property to each pin's Section property.
Thought for 8 sec
I’ll normalize the pin groups to broader categories and set every pin’s
Section to exactly match its Pin Group.Worked for 1 min 9 sec
Updated all 48 pins to use broader functional groups and verified every pin now has a
Section property matching its Pin Group.Open items:
PF6usesReset; Flux accepted it, but it produced an autocomplete warning becauseResetis not one of the preferred Pin Group suggestions.GND_2is still named that way, though its description notes it isAGND.
Suggested next steps:
- Rename
GND_2toAGND. - If you want zero property warnings, change
PF6fromResettoControlorDebug.
Rename and review
Rename AGND pin
Use Control for PF6
Run review checks
Check pin groups
Refine this doc
Ask about this doc
Part Datasheet Review: AVR128DB48-I/PT
Scope
Reviewed available part information for published part
AVR128DB48-I_PT / part UID 5d9e7e79-63bd-4984-b558-1a58b0135891: MPN, package, pin count, description, properties, schematic terminals, footprint nodes, and datasheet-backed pin/spec information.Existing Project Metadata
- Manufacturer Part Number:
AVR128DB48-I/PT - Manufacturer Name:
Microchip - Datasheet URL:
https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/452f680c70df2a026caf192394260eff17c6a5cf24acfe572292bea9cb3f5b01.pdf - Designator Prefix:
IC - Part Type:
Integrated Circuits - Project description:
8-bit Microcontrollers - MCU 128KB, TQFP48, 85C, 24MHz, 12b ADC, Comp, Opamp, MVIO, ZCD, DAC, UART, SPI, TWI - Schematic terminal count: 48 terminals
- BOM: no BOM items, expected for a part project
Because a Datasheet URL was already present, I did not overwrite it. Web search found the official Microchip datasheet URL for reference:
https://www.microchip.com/content/dam/mchp/documents/MCU08/ProductDocuments/DataSheets/AVR128DB28-32-48-64-DataSheet-DS40002247.pdf.Key Datasheet Specs
Source: Microchip AVR128DB28/32/48/64 Data Sheet, DS40002247.
- Device family: AVR DB 8-bit microcontroller family
- Ordering code reviewed:
AVR128DB48-I/PT - Flash / SRAM / EEPROM: 128 KB Flash, 16 KB SRAM, 512 B EEPROM
- Max clock: 24 MHz
- Supply: VDD 1.8 V to 5.5 V; VDDIO2 1.62 V to 5.5 V
- Temperature range for
-I/PT: -40 °C to +85 °C - Package: 48-pin TQFP, Microchip package code PT, tray
- Package body: 7 mm x 7 mm x 1.0 mm body, 9 mm x 9 mm overall lead span
- Lead pitch: 0.50 mm
- Recommended land pattern: 0.30 mm pad width, 1.50 mm pad length, 8.40 mm pad-to-pad spacing, 0.20 mm gap
- Analog/peripheral features: one 12-bit 130 ksps differential ADC, one 10-bit DAC, three analog comparators, up to three op amps, MVIO on Port C, ZCD inputs, UART/SPI/TWI peripherals
- Power domain notes: AVDD is internally connected to VDD; same voltage must be applied to VDD and AVDD. VDDIO2 powers Port C and can differ from VDD.
Pinout Cross-Check
The schematic has 48 terminal components and the pin-number-to-name mapping matches the TQFP48 datasheet pin table, with the exception/notation issues below.
Table
| Pin | Datasheet name | Schematic terminal | Result |
|---|---|---|---|
| 1 | PA5 | PA5 | Match |
| 2 | PA6 | PA6 | Match |
| 3 | PA7 | PA7 | Match |
| 4 | PB0 | PB0 | Match |
| 5 | PB1 | PB1 | Match |
| 6 | PB2 | PB2 | Match |
| 7 | PB3 | PB3 | Match |
| 8 | PB4 | PB4 | Match |
| 9 | PB5 | PB5 | Match |
| 10 | PC0 | PC0 | Match |
| 11 | PC1 | PC1 | Match |
| 12 | PC2 | PC2 | Match |
| 13 | PC3 | PC3 | Match |
| 14 | VDDIO2 | VDDIO2 | Match |
| 15 | GND | GND_1 | Naming acceptable but should describe as GND |
| 16 | PC4 | PC4 | Match |
| 17 | PC5 | PC5 | Match |
| 18 | PC6 | PC6 | Match |
| 19 | PC7 | PC7 | Match |
| 20 | PD0 | PD0 | Match |
| 21 | PD1 | PD1 | Match |
| 22 | PD2 | PD2 | Match |
| 23 | PD3 | PD3 | Match |
| 24 | PD4 | PD4 | Match |
| 25 | PD5 | PD5 | Match |
| 26 | PD6 | PD6 | Match |
| 27 | PD7 | PD7 | Match |
| 28 | AVDD | AVDD | Match |
| 29 | AGND | GND_2 | Mismatch: datasheet pin name is AGND, not generic GND |
| 30 | PE0 | PE0 | Match |
| 31 | PE1 | PE1 | Match |
| 32 | PE2 | PE2 | Match |
| 33 | PE3 | PE3 | Match |
| 34 | PF0 / XTAL32K1 | PF0(XTAL32K1) | Match |
| 35 | PF1 / XTAL32K2 | PF1(XTAL32K2) | Match |
| 36 | PF2 | PF2 | Match |
| 37 | PF3 | PF3 | Match |
| 38 | PF4 | PF4 | Match |
| 39 | PF5 | PF5 | Match |
| 40 | PF6 / RESET | PF6 | Partial: should indicate RESET/input-only role |
| 41 | UPDI | UPDI | Match |
| 42 | VDD | VDD | Match |
| 43 | GND | GND_3 | Naming acceptable but should describe as GND |
| 44 | PA0 / XTALHF1 | PA0(XTALHF1) | Match |
| 45 | PA1 / XTALHF2 | PA1(XTALHF2) | Match |
| 46 | PA2 | PA2 | Match |
| 47 | PA3 | PA3 | Match |
| 48 | PA4 | PA4 | Match |
Footprint Cross-Check
- Footprint node contains 48 pad nodes, matching the TQFP48 pin count.
- Visible silk/body outline is 7 mm x 7 mm with a pin-1 marker, matching the datasheet package body and orientation convention.
- Datasheet package is 48-lead TQFP / Microchip PT, 0.50 mm pitch, 7 mm x 7 mm body.
- The available layout readout did not expose copper pad dimensions/positions in enough detail to verify exact land pattern values against the datasheet recommendation of 0.30 mm x 1.50 mm pads with 8.40 mm pad spacing. This remains an unverified footprint detail.
Mismatches / Issues to Fix
- Pin 29 name mismatch: schematic uses
GND_2, but datasheet pin 29 isAGND. Recommend renaming/displaying pin 29 asAGNDwhile keeping its electrical ground type. - Pin descriptions missing: all terminals show
Pin Type: Unspecified, and no detailedPin Descriptionvalues are populated. Recommend adding datasheet-derived descriptions and electrical types for GPIO, power, ground, reset, and UPDI pins. - PF6 role incomplete: pin 40 is displayed as
PF6; datasheet identifiesPF6/RESETand explicitly states the pin is input-only. Recommend naming/describing it asPF6(RESET)or adding a RESET role description. - Part type is broad: project property uses
Integrated Circuits; datasheet/product category is specifically an 8-bit microcontroller. Recommend changing Part Type toMicrocontrollerif Flux property options allow it. - Footprint land pattern exact dimensions unverified: pin count/body outline appear correct, but exact pad width/length/spacing were not available from the layout inspection output.
Overall Assessment
The part metadata and pin-number mapping are largely consistent with the Microchip datasheet for
AVR128DB48-I/PT. The most important correction is the pin 29 AGND label; the remaining issues are metadata quality improvements and footprint dimensional verification.Scope
Existing Project Metadata
Key Datasheet Specs
Pinout Cross-Check
Footprint Cross-Check
Mismatches / Issues to Fix
Overall Assessment
