Table 29 Miscellaneous Signal Descriptions; Table 30 General Purpose I/O Signal Descriptions - Congatec COM Express conga-TS175 User Manual

Signal Pin # Description
SPI_POWER A91 Power source for carrier board SPI BIOS flash. SPI_POWER shall be used to power
SPI BIOS flash on the carrier only.
BIOS_DIS0# A34 Selection strap to determine the BIOS boot device.
BIOS_DIS1# B88 Selection strap to determine the BIOS boot device.

Table 29 Miscellaneous Signal Descriptions

Signal Pin # Description
I2C_CK B33 General purpose I²C port clock output/input
I2C_DAT B34 General purpose I²C port data I/O line
SPKR B32 Output for audio enunciator, the "speaker" in PC-AT systems
WDT B27 Output indicating that a watchdog time-out event has occurred.
FAN_PWMOUT B101 Fan speed control. Uses the Pulse Width Modulation (PWM) technique to control
the fan's RPM.
FAN_TACHIN B102 Fan tachometer input.
TPM_PP A96 Physical Presence pin of Trusted Platform Module (TPM). Active high. TPM chip has
an internal pull-down. This signal is used to indicate Physical Presence to the TPM.
Note
Some signals have special functionality during the reset process. They may bootstrap some basic important functions of the module. For more
information refer to section 9.2 "Boot Strap Signals".

Table 30 General Purpose I/O Signal Descriptions

Signal Pin # Description
GPO0 A93 General purpose output pins.
Shared with SD_CLK. Output from COM Express, input to SD
GPO1 B54 General purpose output pins.
Shared with SD_CMD. Output from COM Express, input to SD
GPO2 B57 General purpose output pins.
Shared with SD_WP. Output from COM Express, input to SD
GPO3 B63 General purpose output pins.
Shared with SD_CD. Output from COM Express, input to SD
Copyright © 2017 congatec AG
I/O PU/PD
+ 3.3VSB
I 3.3VSB PU 10K
3.3VSB
I 3.3VSB PU 10K
3.3VSB
I/O PU/PD
I/O 3.3V PU 2K2 3.3VSB
I/O 3.3V PU 2K2 3.3VSB
O 3.3V
O 3.3V PD 10K
O OD
3.3V
I OD PU 10K 3.3V
I 3.3V
I/O PU/PD Comment
O 3.3V
O 3.3V
O 3.3V
O 3.3V
TSKLm16
Comment
Carrier shall be left as no-connect.
Carrier shall be left as no-connect
Comment
SPEAKER is a boot strap signal (see
note below)
Requires a fan with a two pulse output.
Trusted Platform Module chip is
optional.
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