QCT Rackgo X, Руководство пользователя

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Possibility Of Been Compatible With Previous Generation Platform
[Quanta]
Technically, it is doable to make the previous revision system with old debug interface to communicate with the new
revision debug card by adding one PCA9555 in the interposer card. But it is still a limited communication, it cannot
completely demonstrate the full function of the new debug card. The reason is as below:
We think the major key design of the new debug card is the serial I2C bus compare to old 14 pin debug card. The LCD
debug card is designed to get post code from PCA9555 I/O expander @MB by I2C and get BMC critical event logs from
BMC@MB through IPMB, An option is to design a PCA9555 I/O expander in the interposer card, so that the LCD debug
card can get post code from this PCA9555@interposer card. However, there is no IPMB in the 14-
pin header, but still can’t
get BMC critical event log if your previous MB design already frozen. Please refer to diagram below, thanks.
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