Table 15 Miscellaneous Signal Descriptions; Table 16 General Purpose I/O Signal Descriptions - Congatec COM Express conga-TC87 User Manual

Table 15 Miscellaneous Signal Descriptions
Signal Pin # Description
I2C_CK
B33
I2C_DAT
B34
SPKR B32
WDT B27
FAN_PWMOUT
B101
FAN_TACHIN
B102
TPM_PP
A96
Note
The congatec COM Express Type 6 and Type 10 modules use a Push-Pull output for the fan_pwm signal instead of the open drain output
specified in the COM Express specification. Although this does not comply with the COM Express specification 2.0, the benefits are obvious.
The Push-Pull output optimizes the power consumed by the fan_pwm signal without functional change.
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 9.5 of this user's guide.
Table 16 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
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General purpose I²C port clock output/input
General purpose I²C port data I/O line
Output for audio enunciator, the "speaker" in PC-AT systems
Output indicating that a watchdog time-out event has occurred.
Fan speed control. Uses the Pulse Width Modulation (PWM) technique to control
the fan's RPM.
Fan tachometer input.
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.
I/O
I/O 3.3V PU 2K2 3.3VSB
I/O 3.3V PU 2K2 3.3VSB
O 3.3V
O 3.3V
O OD
3.3V
I OD
I 3.3V
I/O PU/PD
O 3.3V
O 3.3V
O 3.3V
O 3.3V
I 3.3V PU 10K 3.3V
I 3.3V PU 10K 3.3V
TU87m12
PU/PD Comment
SPEAKER is a boot strap signal
(see note below)
PD 10K
PU 10K 3.3V
PU 10K 3.3V Requires a fan with a two pulse
output.
Trusted Platform Module chip is
optional.
Comment
SDIO interface is not supported on the conga-TC87
SDIO interface is not supported on the conga-TC87
SDIO interface is not supported on the conga-TC87
SDIO interface is not supported on the conga-TC87
SDIO interface is not supported on the conga-TC87
SDIO interface is not supported on the conga-TC87
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