External Bios Spi Flash Header; Gpio Pin Header - Seco CCHPC-C78-C User Manual

External BIOS SPI Flash header

External BIOS Boot SPI header
Pin Signal Pin
1 BOOT_SPI_CS# 8
2 BOOT_SPI_IO1 (MISO) 7
3 BOOT_SPI_IO2 (WP#) 6
4 GND 5
JP20 position JP8 position
Not inserted Not inserted
Not inserted Not inserted
Not inserted Inserted
Not inserted Inserted
Inserted Not inserted
Inserted Not inserted
Inserted Inserted
Inserted Inserted

GPIO pin header

GPIO pin header
Pin Signal
+3.3V_ALW (with 1.5A resettable
1
fuse)
3 GPIO_01
5 GPIO_03
7 GPIO_05
9 GPIO_07
11 GPIO_09
13 GPIO_11
CCHPC-C78-C
CCHPC-C78-C - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.O. - Reviewed by E.S. Copyright © 2023 SECO S.p.A.
In case that an external Flash is needed, then on the carrier board it is provided a 8-pin header,
CN28
p=1.27mm, type TOWNES p/n P1035-2*04MGF-084-D, for the external connection of SPI Flash
devices
Signal
VCC_BOOT_SPI
BOOT_SPI_IO3 (HOLD#)
BOOT_SPI_CLK
BOOT_SPI_IO0 (MOSI)
JP7 position BIOS Boot Device
Not inserted SPI Flash on Module
Inserted
Not inserted SPI Flash on Module
Inserted Reserved
Not inserted SPI Flash on Module
Inserted eSPI on BMC Module
Not inserted SPI Flash on Module
Inserted Reserved
CN31
Pin Signal
2 GPIO_00
4 GPIO_02
6 GPIO_04
8 GPIO_06
10 GPIO_08
12 GPIO_10
14 GND
According to COM HPC
on board, JP7 JP8 and JP20, which allow configuring the
BSEL[0..2]# signals according to the table below, which is used
by the COM HPC Client module to select the BIOS Boot device.
More options are possible for boot from SPI Flash on module. Most
common usage, however, is the first one, i.e. with JP20, JP7 and
different settings on BSEL[0..2] shall be applied.
®
COM HPC specifications foresee up to 12 GPIOs coming out from the client
module.
To deploy them, on HC78 carrier board these signals are carried
out to an external dual row 14 pin, P2.54mm standard pin header,
with the pinout shown in the table on the left.
GPIO_10 and GPIO_11 signals, however, are shared with the BMC connector
CN58 (see par. 3.3.19).
For this reason, two dedicated 3-way jumpers allow the redirection of the
above mentioned GPIO signals, according to the tables below.
®
Specifications, there are three jumpers
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