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User`s guide

ManualsBrandsCongatec ManualsComputer equipmentconga-TCA 047001
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Copyright © 2012 congatec AG TCEDm10 47/94
Table 12 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 PU 10k
3.3VSB
Carrier may pull to SPI_POWER when external
SPI provided but not used.
SPI_MISO A92 Data in to module from carrier board SPI BIOS ash. I 3.3VSB PU 10k
3.3VSB
SPI_MOSI A95 Data out from module to carrier board SPI BIOS ash. O 3.3VSB PU 10k
3.3VSB
SPI_CLK A94 Clock from module to carrier board SPI BIOS ash. O 3.3VSB
SPI_POWER A91 Power source for carrier board SPI BIOS ash. SPI_POWER shall be used to
power SPI BIOS ash on the carrier only.
+ 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 leave 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 leave no-connect
Table 13 Miscellaneous Signal Descriptions
Signal Pin # Description I/O PU/PD Comment
I2C_CK B33 General purpose I²C port clock output/input I/O 3.3V PU 2K2 3.3VSB
I2C_DAT B34 General purpose I²C port data I/O line I/O 3.3V PU 2K2 3.3VSB
SPKR B32 Output for audio enunciator, the “speaker” in PC-AT systems O 3.3V PU 1k 3.3V SPEAKER is a boot strap signal
(see note below)
WDT B27 Output indicating that a watchdog time-out event has occurred. O 3.3V PD 10k
FAN_PWMOUT B101 Fan speed control. Uses the Pulse Width Modulation (PWM) technique to control
the fan’s RPM.
O OD
3.3V
PU 10k 3.3V
FAN_TACHIN B102 Fan tachometer input. I OD PU 10k 3.3V Requires a fan with a 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 Trusted Platform Module chip is
optional.
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 7.5 of this user’s guide.