4.1.1. Changelog for Master TMS570

4.1.1.1. v1.2.2

RTC INTA output circuitry updated to work independent of backup battery presence
adding design variant “production” as primary configuration for board production
adding SBC config to release file (check NOTICE)

RTC INTA output circuitry updated for compatibility with higher supply voltages
wiring of SBC wake signals rearranged: only ignition signal on WAKE1, RTC and CAN1 on WAKE2

design optimization by removing the second SBC (peripheral SPC), now featuring only a single SBC
fixed wiring of Ethernet PHY in schematic and layout
control of CAN1 enable and !standby signals directly from MCU instead of port expander to increase compatibility with upcoming CAN bootloader
updated schematic comment related to SBC debug pulse length

Improved SBC wake-up pulse generation circuit by changing value of R7233 to 470kOhm

fixed swapped INTA/INTB pinout of U6400 (PCF2131TF)
added OSHWA logo on PCB
modified power MOSFET and according control circuitry (Q4400-Q4402) for switching external insulation monitor (current rating of previous design was too weak)

fixed assignment of memory devices (MRAM, FRAM, FLASH) to SPI3 chip select pins (net labels were swapped)
split oscillator (Y6100) into two different part numbers and BOM items (one part for 20 MHz and 25 MHz)
added voltage limiting Zener diodes to gates of Q6401 and Q6404
added 100 nF capacitor to “ON” pin of U7300 in order to improve transient immunity
fixed faulty solder paste layer on component U7100
replaced Ethernet socket J2001 due to availability issues (old part number: Wuerth 615008185121, new part number: Wuerth 615008137421)

added clamping diodes for contactor feedback resistor dividers in order to protect inputs of port expander
added clamping diodes to insulation monitor PWM and OK inputs
adjusted contactor connectors pinout to match foxBMS 1 Master pinout
replaced R8014 and R8017 10k resistors with 10R resistors due to amplifier gain error
added placement option to use ADUM6401 as a digital isolator for the CAN2 interface
fixed a typo in EMIF connector silk screen
improved free space around debug connector (debug connector was moved towards upper edge of board)
changed global polygon connect style to relief connect in order to improve solderabilty of through-hole connectors
fixed solder paste areas for Mictor debug connector
modified all mounting holes to fit Wuerth SMT spacers (outer diameter = 6mm)
removed interlock high-side switch from default component variant due to availability issues
added hardware board version coding using IO1_0 to IO1_7 of port-expander1

replaced CAN transceiver with TCAN1043HDQ1 (SOIC-14 package) due to availability issues
added battery holder for CR1225 RTC battery (BR2470 battery is now optional)
changed value of all I2C pull-up resistors from 5.1 \({k\Omega}\) to 2.49 \({k\Omega}\)
removed buck-boost converter IC from “default” component variant due to availability issues
removed Ethernet PHY IC from “default” component variant due to availability issues
finalized PCB layout
added mechanical dimensions to draftman document