Introduction

One of the biggest issues with MSXI's electrical system was its inconsistency in parts and pinouts. There were at least 3 variations of the CAN controller/transceiver circuit and which SPI bus they were connected to, making debugging difficult. Some used different footprints, while others used different parts. This also made inventory a challenge, as each board had its own very specific set of components.

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• Allows creation of a debug carrier board to allow self-test of the MCU and CAN
• Simplifies inventory management and software, allowing a single core config for all boards
• Simplifies board debugging - isolates issues to either the controller or carrier boards
• Reduces cost of bringing up backup boards

Part Selection

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Info	Digikey Link	Product Details

STM32F072RBT6

Image
ARM Cortex-M0 microcontroller STM32F072RBT6 Includes CAN controller, 51 IOs, 64-LQFP	497-14644-ND	http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32f0-series/stm32f0x2/stm32f072rb.html
TCAN332DR

CAN Transceiver Replacement for the SN65HVD232DR	296-43711-1-ND
External CAN connector
Molex internal wire-to-board surface mount PCB headers Molex internal wire-to-board connector housings Molex internal wire-to-board connector crimp terminals	WM1343-ND WM2903-ND WM2562CT-ND	http://www.molex.com/molex/products/datasheet.jsp?part=active/0015912055_PCB_HEADERS.xml http://www.molex.com/molex/products/datasheet.jsp?part=active/0050579405_CRIMP_HOUSINGS.xml http://www.molex.com/molex/products/datasheet.jsp?

CAN connector

TODO: Move to different connector for internal CAN connections?

  

TE 1565357-6

50 pin, 0.5mm pitch, 4-6mm stack height

part=active/0016020069_CRIMP_TERMINALS.xml	Image AddedImage AddedImage Added
Molex internal wire-to-board surface mount PCB headers Molex internal wire-to-board connector housings Molex internal wire-to-board connector crimp terminals	WM18448-ND WM18436-ND WM2501CT-ND	http://www.molex.com/molex/products/family?key=minifit_jr&channel=products&chanName=family&pageTitle=Introduction http://www.molex.com/molex/products/datasheet.jsp?part=active/0039014050_CRIMP_HOUSINGS.xml Mini-Fit Jr	Image AddedImage AddedImage Added
TE internal wire-to-board through hole PCB headers TE internal wire-to-board surface mount PCB headers TE internal wire-to-board flat flex cable assembly	A33865-ND A100864CT-ND A9CCG-0502F-ND	AMPMODU MTE	Image AddedImage AddedImage Added
TE internal wire-to-board surface mount PCB headers TE internal wire-to-board connector housings TE internal wire-to-board connector crimp terminals	A33215CT-ND A30261-ND A30305-ND	http://www.te.com/usa-en/products/connectors/input-output-connectors/rectangular-i-o/intersection/3mm-low-profile-micro-mate-n-lok-connectors.html?tab=pgp-story Low-profile Micro Mate-N-Lok	Image AddedImage AddedImage Added
Board-to-board IO terminal Non-hermaphroditic but slightly cheaper	A110996CT-ND	http://www.te.com/usa-en/product-1565357-6.html#pdp-docs-features

10106813-051112LF

Board-to-board IO terminal Mezzostak Hermaphroditic connectors Samples

have been requested

from FCI are out of stock, order from Digikey

609-4602-1-ND

http://portal.fciconnect.com/Comergent//fci/documentation/gs-12-577.pdf

Image Modified

LS2

Board-

125-01-F-D-RA1

to-board IO terminal Samtec LS2 locking hermaphroditic connectors

SICK SHIT, but they keep getting sold out on digikey and are a bit more expensive

Samples have been requested Electrical and mechanical models available	LS2-125-01-F-D-RA1-ND	https://www.samtec.com/products/ls2	Image Modified
Board-to-board IO terminal Samtec LSHM high-speed hermaphroditic terminals Samples have been requested Electrical and mechanical models available	Not on Digikey, will have to find supplier LSHM-150-02.5-L-DV-A-S-TR	https://www.samtec.com/products/lshm	Image Added

MCU Schematic Capture

Peripheral Selection

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