Dasharo compatible with MSI PRO Z690-A and PRO Z790-P - development

Intro

This document gather various notes and documentation useful for development of Dasharo compatible with the MSI PRO Z690-A and PRO Z790-P platform.

Hardware connection

Requirements

• peripherals listed in the:
  • PRO Z690-A Hardware Configuration Matrix
  • PRO Z790-P Hardware Configuration Matrix
  • PRO B850-P Hardware Configuration Matrix
• RTE
• Sonoff S20 Smart Plug with custom firmware
• DB9 null modem cable (MSI PRO B850-P only)
• DB9 serial port to 10 pin header adapter (MSI PRO B850-P only)

Serial debug

Note

MSI PRO Z690-A/Z790-P only!

• Attach the jumpers in J16 header to enable header J18 according to the table below:

Jumper position (TX)	Jumper position (RX)
EXT + COM	EXT + COM

• Connect signals from the J18 header to serial receiver:

RTE	Msi Z690/Z790
J18 pin 1 (GND)	JBD1 pin 1 (pin closer to JBAT1)
J18 pin 2 (RX)	JBD1 pin 2 (pin further from JBAT1)

Pins on JBD1 are not described in the documentation. They have been discovered experimentally. Pay attention to the connections.

Please also note that this is uni-directional communication. We can gether logs from booting, but we cannot provide input to the platform at the same time.

Serial console

Note

MSI PRO B850-P only!

1. Connect IDC 10-pin to DB9 adapter to JCOM1 on the board
2. Connect DB9 adapter end with DB9 null model cable
3. Connect one end of DB9 null modem cable to RTE RS232 DB9 connector.

SPI

• For external flashing, connect RTE with motherboard according to the table below:

RTE SPI header	MSI Z690-A/Z790-P/B850-P
J7 pin 1 (Vcc)	JTPM1 pin 1 (SPI Power)
J7 pin 2 (GND)	JTPM1 pin 7 (GND)
J7 pin 3 (CS)	JTPM1 pin 5 (RESERVED / BIOS SPI CS pin)
J7 pin 4 (SCLK)	JTPM1 pin 6 (SPI Clock)
J7 pin 5 (MISO)	JTPM1 pin 3 (MISO)
J7 pin 6 (MOSI)	JTPM1 pin 4 (MOSI)

JTPM1 is a 2mm pitch header, you will need 2mm to 2.54mm female-female dupont wires to connect to RTE.

The JTPM1 pin5 is actually BIOS SPI CS pin (marked as reserved in the board manual).

• Example connection:

Power control

Power buttons control

• Connect 12V/4A power supply to RTE J13 connector to power on RTE

• Connect power control pins from mainboard to RTE according to the table below:

JFP1 is located in the corner of the mainbaord, near SATA interface ports

RTE	MSI Z690-A/Z790-P/B850-P
J11 pin 9	JFP1 pin 6 (PWR_ON)
J11 pin 8	JFP1 pin 7 (RST)
J15 pin 1 (GND)	JFP1 pin 5 (GND)

Power supply control

Connect the power supply unit to the mains via Sonoff S20 Smart Plug. To power control via RTE, Sonoff smart plug