
Maps and Registers
ATCA-7540 Installation and Use (6806871A01A)
157
5.1.18 PCH Output Enable Register
The output signals, PCH_RCIN_, PCH_SCI_ and PCH_PSTATE_ are connected to the GPIO Pins
of the PCH. After power-up, the PCH drives these signals. To avoid signal contention, the
outputs are tri-stated. After software has configured the PCH GPIO pins as inputs, the
corresponding outputs can be enabled with this register.
5.1.19 RTM SPI Interface Registers
The signals, RTM_SPI_SCK, RTM_SPI_SS_, RTM_SPI_MISO and RTM_SPI_MOSI are used to
support a SPI master protocol. The signal, RTM_SPI_MISO is also used to signal an RTM
interrupt to the baseboard. See
Flash Status and Selection Registers
Table 5-78. PCH Output Enable Register
Address Offset: 0x41
Bit
Description
Default
Access
0
PCH_RCIN_ enable:
0: Disabled. Signal is tri-state
1: Enabled. Drive pch_rcin
0
LPC: r/w
1
PCH_SCI_ enable:
0: Disabled. Signal is tri-state
1: Enabled. Drive pch_sci
0
LPC: r/w
2
PCH_PSTATE_ enable:
0: Disabled. Signal is tri-state
1: Enabled. Drive pch_pstate
0
LPC: r/w
7:3
Reserved
0
0
NOTICE
At the moment there is no RTM with an SPI interface defined.
Содержание ATCA-7540
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Страница 34: ...Safety Notes 34 ATCA 7540 Installation and Use 6806871A01A ...
Страница 66: ...Hardware Preparation and Installation 66 ATCA 7540 Installation and Use 6806871A01A ...
Страница 276: ...Supported IPMI Commands 276 ATCA 7540 Installation and Use 6806871A01A ...
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