Msi b850 lab assembly guide #1194
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Signed-off-by: Jakub Sobota <jakub.sobota@3mdeb.com>
Signed-off-by: Jakub Sobota <jakub.sobota@3mdeb.com>
BeataZdunczyk
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mkopec
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Jan 22, 2026
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| 1. Connect the RTE J18 header to the platform JBD1 header as described in the | ||
| table: | ||
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| | RTE | MSI PRO B850 | | ||
| |:---------------:|:-----------------------:| | ||
| | J18 pin 1 (GND) | JCOM1 pin 5 | | ||
| | J18 pin 2 (RX) | JCOM1 pin 3 | | ||
| | J18 pin 3 (TX) | JCOM1 pin 2 | |
Contributor
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JCOM1 header on this board uses RS232 signal levels (i.e. 12V), it cannot be directly connected to the CMOS/TTL signal levels present on RTE pins. One has to use IDC to DB9 adapter and DB9 null modem cable to connect to DB9 connector on RTE.
| * Sonoff S20 type E | ||
| * 7x standard female-female connection wire 2.54 mm raster | ||
| * 7x standard female-female connection wire 2.54/2.00 mm raster | ||
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Contributor
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- DB9 null moderm cable
- IDC 9-pin to DB9 adapter
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| ### Serial connection | ||
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| 1. Attach the jumpers in the RTE J16 header to enable header J18: |
Contributor
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Jumper position should be on RS232
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