AllSpice-Demos/AllSpice-epaper-demo
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Initial Development #26

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allspice-kyle commented 2023-11-04 15:07:32 +00:00
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Depends on AllSpice/AllSpice-Demo-PCB#24
Depends on AllSpice/AllSpice-Demo-Library#23

Resolved Issues

Closes #1
Closes #2
Closes #3
Closes #4

Description

The goal of this review is to:

To Do

Design Review Checklist

Process

  • Schematic and PCB file names follow standard
  • Export necessary review files (3D model, BOM, etc.)
  • Update relevant system architecture documents
  • Update project README page
  • Simulations uploaded and outputs explained

System

  • Power
    • Sufficient power supplied from upstream source
    • Supply rated for necessary country specifications
    • Estimated total worst-case power supply draw
  • Connectors
    • I/Os are specified
    • Sufficient Current and Voltage rating
    • Mating connectors have matching pinout
    • Same contact material specified for mating connectors
  • Testing
    • Test procedure written
  • Environmental
    • Specified min/max operating temperature
    • Specified min/max storage temperature
    • Specified min/max humidity
  • ROHS compliance requirement review

Components

  • Unpopulated components are denoted DNI
  • Components meet environmental specifications
  • All components have quantity, reference designator and description
  • Suggested and alternate manufacturers listed
  • Price and stock checked for each component
  • Component derating
    • Voltage
    • Current
    • Power at worst-case operating temperature
    • Temperature at worst-case power

Schematics

  • Document
    • Dot on each connection
    • No four-point connections
    • Title block completed for each sheet
    • All components have reference designators and values
    • Multi-part components don't have unplaced symbols
    • Page title present and consistent on all pages if not in title block
    • Symbols identify open collector/drain pins and internal pulled up/down pins
    • Pin names and attributes on symbols with multi-function pins should match actual design usage (I/O/Bi, Name)
    • Components follow preferred reference designator pattern
  • External I/O
    • Filtered for EMI
    • Protected against electrostatic discharge (ESD)
    • Unused inputs terminated
  • Microcontrollers / ICs
    • Predictable or controlled power-up state
      • Reset filtered
    • Sufficient bypass capacitance
    • Oscillators checked for reliable startup
    • Pullups on open-collector pins
    • Logic-low and logic-high voltage levels checked
    • No-connect pins labeled NC
    • Clock lines with series termination and parallel termination component locations present even if not populated; zero ohm resistor for series, unpopulated parts for parallel termination
    • Check for input voltages applied with power off and CMOS latchup possibilities
    • Check the data sheet errata and apnotes for weird IC behaviors
  • Busses
    • UART/USART TX->RX and RX<-TX
    • I2C SDA and SCL pullup with appropriate value per capacitance
    • Setup, hold, access times for data and address busses
  • Analog
    • Sufficient power rails for analog circuits
    • Amplifiers checked for stability
    • Consider signal rate-of-rise and fall for noise radiation
  • General
    • Sufficient bulk capacitance calculated
    • Polarized components checked
    • Electrolytic/tantalum capacitors checked for no reverse voltage
    • Electrolytic/tantalum capacitors temperature/voltage derating sufficient for MTBF
    • Sufficient capacitance on low dropout voltage regulators
    • Sufficient time delays and slew rates for comparators
    • Sufficient common mode input voltage rating on opamps
    • Check pin numbers of all custom-generated parts
    • Check reverse base-emitter current/voltage on bipolar transistors
    • Power nets use preferred and consistent naming (ex. no 3.3V vs +3.3V)
    • Debug resources added by design (leds, serial ports, etc.) even if unpopulated by default

PCB

  • Check outline and size of PCB
Depends on https://hub.allspice.io/AllSpice/AllSpice-Demo-PCB/pulls/24 Depends on https://hub.allspice.io/AllSpice/AllSpice-Demo-Library/issues/23 ## Resolved Issues Closes #1 Closes #2 Closes #3 Closes #4 ## Description The goal of this review is to: - Verify the initial schematic design, which includes: - Epaper series display connector: https://www.waveshare.com/product/displays/e-paper/epaper-3/2.13inch-e-paper-g.htm - Including supporting circuitry - Battery mounting - ESP32 Model included initially as a PCB mounted module: https://esp32s3.com/nanos3.html - Next iteration will embed ESP32 chip and supporting circuitry - Verify rough PCB outline and component placement - Verify initial power budget ## To Do - [ ] #6 - [ ] Supporting circuitry for [e-paper display](https://files.waveshare.com/upload/5/57/2.13inch_e-Paper_HAT_Schematic.pdf) ## Design Review Checklist ### Process - [ ] Schematic and PCB file names follow standard - [ ] Export necessary review files (3D model, BOM, etc.) - [ ] Update relevant system architecture documents - [ ] Update project README page - [ ] Simulations uploaded and outputs explained ### System - [ ] Power - [ ] Sufficient power supplied from upstream source - [ ] Supply rated for necessary country specifications - [ ] Estimated total worst-case power supply draw - [ ] Connectors - [ ] I/Os are specified - [ ] Sufficient Current and Voltage rating - [ ] Mating connectors have matching pinout - [ ] Same contact material specified for mating connectors - [ ] Testing - [ ] Test procedure written - [ ] Environmental - [ ] Specified min/max operating temperature - [ ] Specified min/max storage temperature - [ ] Specified min/max humidity - [ ] ROHS compliance requirement review ### Components - [ ] Unpopulated components are denoted DNI - [ ] Components meet environmental specifications - [ ] All components have quantity, reference designator and description - [ ] Suggested and alternate manufacturers listed - [ ] Price and stock checked for each component - [ ] Component derating - [ ] Voltage - [ ] Current - [ ] Power at worst-case operating temperature - [ ] Temperature at worst-case power ### Schematics - [ ] Document - [ ] Dot on each connection - [ ] No four-point connections - [ ] Title block completed for each sheet - [ ] All components have reference designators and values - [ ] Multi-part components don't have unplaced symbols - [ ] Page title present and consistent on all pages if not in title block - [ ] Symbols identify open collector/drain pins and internal pulled up/down pins - [ ] Pin names and attributes on symbols with multi-function pins should match actual design usage (I/O/Bi, Name) - [ ] Components follow preferred reference designator pattern <!-- Link to spec --> - [ ] External I/O - [ ] Filtered for EMI - [ ] Protected against electrostatic discharge (ESD) - [x] Unused inputs terminated - [ ] Microcontrollers / ICs - [x] Predictable or controlled power-up state - [x] Reset filtered - [x] Sufficient bypass capacitance - [x] Oscillators checked for reliable startup - [ ] Pullups on open-collector pins - [ ] Logic-low and logic-high voltage levels checked - [x] No-connect pins labeled NC - [ ] Clock lines with series termination and parallel termination component locations present even if not populated; zero ohm resistor for series, unpopulated parts for parallel termination - [ ] Check for input voltages applied with power off and CMOS latchup possibilities - [ ] Check the data sheet errata and apnotes for weird IC behaviors - [ ] Busses - [x] UART/USART TX->RX and RX<-TX - [ ] I2C SDA and SCL pullup with appropriate value [per capacitance](https://www.ti.com/lit/an/slva689/slva689.pdf) - [ ] Setup, hold, access times for data and address busses - [ ] Analog - [ ] Sufficient power rails for analog circuits - [ ] Amplifiers checked for stability - [ ] Consider signal rate-of-rise and fall for noise radiation - [ ] General - [ ] Sufficient bulk capacitance calculated - [ ] Polarized components checked - [ ] Electrolytic/tantalum capacitors checked for no reverse voltage - [ ] Electrolytic/tantalum capacitors temperature/voltage derating sufficient for MTBF - [ ] Sufficient capacitance on low dropout voltage regulators - [ ] Sufficient time delays and slew rates for comparators - [ ] Sufficient common mode input voltage rating on opamps - [ ] Check pin numbers of all custom-generated parts - [ ] Check reverse base-emitter current/voltage on bipolar transistors - [ ] Power nets use preferred and consistent naming (ex. no `3.3V` vs `+3.3V`) - [ ] Debug resources added by design (leds, serial ports, etc.) even if unpopulated by default ### PCB - [ ] Check outline and size of PCB
allspice-kyle added 42 commits 2023-11-04 15:07:33 +00:00 
https://hub.allspice.io/AllSpice/AllSpice-Demo-PCB/wiki/Prototype-dev-board-shopping-list
Reviewed-on: AllSpice/AllSpice-Demo-PCB#24
allspice-kyle added 1 commit 2023-11-04 15:45:11 +00:00
AllSpiceAlice added 1 commit 2023-11-04 16:02:06 +00:00
allspice-kyle added a new dependency 2023-11-04 16:20:59 +00:00
#12 [action] Create shopping list for first prototype
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#12 [action] Create shopping list for first prototype
AllSpice-Demos/AllSpice-epaper-demo
Reference: AllSpice-Demos/AllSpice-epaper-demo#26
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