PIC32Module

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• Author(s)
• Information(s)
• Overview
• Ideas and details
  • Arduino
• Technical
  • Microcontroller
  • Ethernet PHY
  • CAN transceivers
  • Auto-switch power mux
  • USB Isolation
  • Plastic case
  • Flash Memory
  • Connectors
    • CAN_BUS Flat-Cable pinout (2 x 5)
  • RTC++
• Similar Projects
• External Storage
• Misc.
• Open Questions

Author(s)

• Jean-François Duval
• Dominic Létourneau

Information(s)

• You might be interested in our [PIC32Dev] module. The new design will be based on what we have learned from the board.

Overview

• 2 x CAN
• I2C, SPI
• USB Host/OTG
• SD Card
• PIC32
• Small, low cost module

Ideas and details

• Compact and practical credit card size made for easy prototyping
  • 85mm x 55mm
• PIC32 w/ Ethernet and USB
• PIC32 used as an USB Device (onboard peripheral)
• Ethernet
• 2x CAN 2.0
• Supports I2C and SPI
• Few digital and analog I/O available to the user
• Low cost, small connectors
• USB-Powered, auto-switch
• Wide-range external DC power source
• Integrated in a case
• 4-layers PCB
• Make it compatible with Arduino I/O connectors?
• ZigBee / xBee support
• 802.11 support
• Real Time Clock + Battery backup
• FTDI USB UART + Flow Control
• BlueGiga BT Module support
  • Arduino Reference Design
• Breadboard compatible
• ICSP connector
• Temperature sensor
• Android Open Accessory support
  • Microchip dev kits for Android

Arduino

• Offers all arduino capabilities + more processing power

Technical

Microcontroller

• PIC32MX795F512L TQFP-100 11.98$(http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en545660, http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PIC32MX795F512L-80I/PT-ND)
• PIC32MX795F512H TQFP-64 11.14$(http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PIC32MX795F512H-80I/PT-ND)

Ethernet PHY

• National DP83848 3.84$ (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=DP83848JSQCT-ND)

CAN transceivers

• TI SN65HVD230 4.05$ (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-11654-1-ND)

Auto-switch power mux

• TI TPS2111 2.63$ (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-16936-1-ND)

USB Isolation

• Analog Devices ADUM4160BRWZ 12.64$(http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ADUM4160BRWZ-ND)

Plastic case

• Hammond 1551RTBU 1.90$ 50x50x20mm (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=HM1142-ND)
• Hammond 1593KBK 2.88$ (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=HM355-ND)

Flash Memory

• SPI Flash to store configuration
• EEPROM + MAC ADDRESS
  • Microchip 24AA02E48 (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=24AA025E48T-I/OTTR-ND)

Connectors

• CAN with RJ-11 Connectors?

CAN_BUS Flat-Cable pinout (2 x 5)

• CiA Draft Standard 102 version 2.0

Signal Description
D-SUB-9 pin
Flat-cable Pin

Reserved
1
1

CAN_L
2
3

CAN_GND
3
5

Reserved
4
7

CAN_SHLD
5
9

CAN_GND
6
2

CAN_H
7
4

Reserved
8
6

CAN_V+
9
8

Not Used
-
10

RTC++

• Microchip MCP79410: 1k EEPROM, Unique ID, I2C, 1.36$ http://www.microchip.com/en_US/technology/realtimeclock/products.html

Similar Projects

• http://www.schmalzhaus.com/UBW32/
• http://www.sparkfun.com/products/9645
• http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2615&dDocName=en545713
• http://www.digilentinc.com/Products/Catalog.cfm?NavPath=2,892&Cat=18
  • https://github.com/chipKIT32

External Storage

• SD card slot

Misc.

RobotShop Technology Accelerator: "If you are an inventor and/or developer and have a patent and/or commercialization license from your university, following a Masters or PhD for example, but you lack the resources and know-how to bring your product to market, the RobotShop Technology Accelerator can help you." http://www.robotshop.com/accelerator.html

Open Questions

• If we use the "credit card" form factor, do we still want to use an enclosure? It could be an Hammond 1591XXMFLBK or 1591XXLFLBK. May be complex to fit all the connectors...
• Is Micro-SD ok? Much cheaper than full-sized SD
• Do we need an on-board FLASH? A USB key on the Host port would do the job.