ADLINK Technology arm AMPERE COM-HPC-ALT - General Purpose SPI

COM-HPC-ALT User’s Guide PICMG COM-HPC R1.0
Page 23 Copyright © 2023 ADLINK Technology, Inc.
with a MMC (Module Management Controller). The Module IPMB is a slave port. See Section Error! Bookmark not defined. below for more details on
platform management topics.
Name
Pin #
Description
I/O
PU / PD
Comment
IPMB_CLK
B91
Clock I/O line for the multi-master IPMB port
I/O OD
3.3VSB
PU 47K
3.3VSB
IPMB_DAT
B92
Data I/O line for the multi-master IPMB port
I/O OD
3.3VSB
PU 47K
3.3VSB
Note: Weak pull-up values are shown for the IPMB CLK and DAT lines in Table above. These are merely to prevent the lines from floating if no
Carrier BMC is present. Stiffer pull-ups should be implemented on the Carrier with values appropriate to the situation at hand if the Carrier
implements a BMC and an IPMB master.
4.3.9 General Purpose SPI
Name
Pin #
Description
I/O
PU / PD
Comment
GP_SPI_MISO
B94
Serial data into the COM-HPC Module from the
Carrier GP_SPI device (“Master In Slave Out”)
I 3.3V
PU 10K
GP_SPI_MOSI
B93
Serial data from the COM-HPC Module to the Carrier
GP_SPI device (“Master Out Slave In”)
O 3.3V
GP_SPI_CLK
B99
Clock from the Module to Carrier GP_SPI device
O 3.3V
GP_SPI_CS0#
GP_SPI_CS1#
GP_SPI_CS2#
GP_SPI_CS3#
B95
B96
B97
B98
GP_SPI chip selects, active low
O 3.3V