Copyright
©
2014
congatec
AG
TA30m16
56/95
Table 27 LPC Signal Descriptions
Signal
Pin # Description
I/O
PU/PD Comment
LPC_AD[0:3]
B4-B7
LPC multiplexed address, command and data bus
I/O 3.3V
LPC_FRAME#
B3
LPC frame indicates the start of an LPC cycle
O 3.3V
LPC_DRQ[0:1]#
B8-B9
LPC serial DMA request
I 3.3V
Not connected
LPC_SERIRQ
A50
LPC serial interrupt
I/O 3.3V
LPC_CLK
B10
LPC clock output - 33MHz nominal
O 3.3V
33 MHz with Bay Trail-I SoC (Intel Atom series)
25 MHz with Bay Trail-M/D SoC (Intel Celeron series)
Table 28 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 69k8
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
+ 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 29 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 2k0 3.3VSB
I2C_DAT
B34
General purpose I²C port data I/O line
I/O 3.3V PU 2k0 3.3VSB
SPKR
B32
Output for audio enunciator, the “speaker” in PC-AT systems
O 3.3V
PU 4k99 3.3V
WDT
B27
Output indicating that a watchdog time-out event has occurred
O 3.3V
PD 10k
FAN_PWMOUT
1,2
B101
Fan speed control. Uses the Pulse Width Modulation (PWM) technique to control
the fan's RPM
O OD
3.3V