Table 30 General Purpose I/O Signal Descriptions - Congatec COM Express conga-TCA3 User Manual

Signal Pin # Description
FAN_TACHIN 1,2 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
1. For fan control implementation, see the COM Express Design Guide
2. Protected on the module by a series schotty diode. Therefore, pull-down resistor is required on the carrier board for proper logic level.
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
GPI0 A54 General purpose input pins. Pulled high internally on the module
Shared with SD_DATA0. Bidirectional signal
GPI1 A63 General purpose input pins. Pulled high internally on the module.
Shared with SD_DATA1. Bidirectional signal
GPI2 A67 General purpose input pins. Pulled high internally on the module
Shared with SD_DATA2. Bidirectional signal
GPI3 A85 General purpose input pins. Pulled high internally on the module
Shared with SD_DATA3. Bidirectional signal
Copyright © 2014 congatec AG
I/O PU/PD
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
I 3.3V PU 10K 3.3V Pull-up only active in GPIO mode
I 3.3V PU 10K 3.3V Pull-up only active in GPIO mode
I 3.3V PU 10K 3.3V Pull-up only active in GPIO mode
I 3.3V PU 10K 3.3V Pull-up only active in GPIO mode
TA30m16
Comment
Requires a fan with two pulse
output
Trusted Platform Module chip
is optional
57/95