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2018
congatec
AG
TR44m17
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Table 21
SPI BIOS Flash Interface Signal Descriptions
Signal
Pin # Description
I/O
PU/PD
Comment
SPI_CS#
B97
Chip select for Carrier Board SPI BIOS Flash.
O 3.3VSB
SPI_MISO
A92
Data in to module from carrier board SPI BIOS flash.
I 3.3VSB
SPI_MOSI
A95
Data out from module to carrier board SPI BIOS flash.
O 3.3VSB
SPI_CLK
A94
Clock from module to carrier board SPI BIOS flash.
O 3.3VSB
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.
P 3.3VSB
BIOS_DIS0#
A34
Selection strap to determine the BIOS boot device.
I 3.3VSB
PU 10K 3.3VSB
Carrier shall pull to GND or left as no-connect.
BIOS_DIS1# B88
Selection strap to determine the BIOS boot device.
I 3.3VSB
PU 10K 3.3VSB
Carrier shall pull to GND or left as no-connect
Table 22
General Purpose I/O Signal Descriptions
Signal
Pin # Description
I/O
PU/PD
Comment
GPO0
A93
General purpose output pins.
O 3.3V
GPO1
B54
General purpose output pins.
O 3.3V
GPO2
B57
General purpose output pins.
O 3.3V
GPO3
B63
General purpose output pins.
O 3.3V
GPI0
A54
General purpose input pins. Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
GPI1
A63
General purpose input pins. Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
GPI2
A67
General purpose input pins. Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
GPI3
A85
General purpose input pins. Pulled high internally on the module.
I 3.3V
PU 10K 3.3V
Table 23
Miscellaneous Signal Descriptions
Signal
Pin # Description
I/O
PU/PD
Comment
I2C_CK
B33
General purpose I²C port clock output/input
I/OD 3.3V PU 2.2K 3.3VSB
I2C_DAT
B34
General purpose I²C port data I/O line
I/OD 3.3V PU 2.2K 3.3VSB
SPKR
B32
Output for audio enunciator, the “speaker” in PC-AT systems
O 3.3V
WDT
B27
Output indicating that a watchdog time-out event has occurred. O 3.3V
FAN_PWMOUT
B101
Fan speed control. Uses the Pulse Width Modulation (PWM)
technique to control the fan’s RPM.
O OD
3.3V
PU 47K 3.3V
Signal is driven to logic 1 only. External PD is
required.
FAN_TACHIN
B102
Fan tachometer input.
I OD
PU 47K 3.3V
Requires a fan with two-pulse output.
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.
I 3.3V
PD 10K
A TPM 2.0 chip is assembled on the module
by default.
