DFI BT9A3 - Manual (Page 18)

www.dfi .com Chapter 3 Hardware Installation
18
Chapter 3
Signal Pin# Pin Type Pwr Rail /Tolerance BT9A3 Carrier Board Description
LVDS_A0+ A71
LVDS_A0- A72
LVDS_A1+ A73
LVDS_A1- A74
LVDS_A2+ A75
LVDS_A2- A76
LVDS_A3+ A78
LVDS_A3- A79
LVDS_A_CK+ A81
LVDS_A_CK- A82
LVDS_VDD_EN A77 O CMOS 3.3V / 3.3V
Connect to enable control of LVDS panel power
circuit
LVDS panel power enable
LVDS_BKLT_EN B79 O CMOS 3.3V / 3.3V
Connect to enable control of LVDS panel backlight
power circuit.
LVDS panel backlight enable
LVDS_BKLT_CTRL B83 O CMOS 3.3V / 3.3V
Connect to brightness control of LVDS panel
backlight power circuit.
LVDS panel backlight brightness control
LVDS_I2C_CK A83 I/O OD CMOS 3.3V / 3.3V PU 2.2K to 3.3V Connect to DDC clock of LVDS panel I2C clock output for LVDS display use
LVDS_I2C_DAT A84 I/O OD CMOS 3.3V / 3.3V PU 2.2K to 3.3V Connect to DDC data of LVDS panel I2C data line for LVDS display use
Signal Pin# Pin Type Pwr Rail /Tolerance BT9A3 Carrier Board Description
LPC_AD0 B4
LPC_AD1 B5
LPC_AD2 B6
LPC_AD3 B7
LPC_FRAME# B3 O CMOS 3.3V / 3.3V LPC frame indicates the start of an LPC cycle
LPC_DRQ0# B8
LPC_DRQ1# B9
LPC_SERIRQ A50 I/O CMOS 3.3V / 3.3V PU 8.2K to 3.3V LPC serial interrupt
LPC_CLK B10 O CMOS 3.3V / 3.3V LPC clock output - 33MHz nominal
Signal Pin# Pin Type Pwr Rail /Tolerance BT9A3 Carrier Board Description
SPI_CS# B97 O CMOS 3.3V Suspend/3.3V
Connect a series resistor 33ȟ to Carrier
Board SPI Device CS# pin
Chip select for Carrier Board SPI - may be sourced from chipset SPI0 or SPI1
SPI_MISO A92 I CMOS 3.3V Suspend/3.3V
Connect a series resistor 33ȟ to Carrier
Board SPI Device SO pin
Data in to Module from Carrier SPI
SPI_MOSI A95 O CMOS 3.3V Suspend/3.3V
Connect a series resistor 33ȟ to Carrier
Board SPI Device SI pin
Data out from Module to Carrier SPI
SPI_CLK A94 O CMOS 3.3V Suspend/3.3V
Connect a series resistor 33ȟ to Carrier
Board SPI Device SCK pin
Clock from Module to Carrier SPI
SPI_POWER A91 O 3.3V Suspend/3.3V
Power supply for Carrier Board SPI – sourced from Module – nominally
3.3V. The Module shall provide a minimum of 100mA on SPI_POWER.
Carriers shall use less than 100mA of SPI_POWER. SPI_POWER
shall only be used to power SPI devices on the Carrier
BIOS_DIS0# A34
BIOS_DIS1# B88
Signal Pin# Pin Type Pwr Rail /Tolerance BT9A3 Carrier Board Description
SER0_TX A98 O CMOS
5V / 12V(design 3.3v~5V
tolerant)
PD 4.7K General purpose serial port 0 transmitter
SER0_RX A99 I CMOS
5V / 12V(design 3.3v~5V
tolerant)
PU 47K to 3.3V General purpose serial port 0 receiver
SER1_TX A101 O CMOS
5V / 12V(design 3.3v~5V
tolerant)
PD 4.7K General purpose serial port 1 transmitter
SER1_RX A102 I CMOS
5V / 12V(design 3.3v~5V
tolerant)
PU 47K to 3.3V General purpose serial port 1 receiver
O LVDS LVDS
LVDS Channel A differential clock O LVDS LVDS
LVDS Signals Descriptions
O LVDS LVDS
LVDS Channel A differential pairs
O LVDS LVDS
O LVDS LVDS
Connect to LVDS connector
Connect to LVDS connector
Connect to LVDS connector
Connect to LVDS connector
Connect to LVDS connector
I/O CMOS 3.3V / 3.3V
3.3V / 3.3V LPC serial DMA request
SPI Signals Descriptions
I CMOS
LPC multiplexed address, command and data bus
Connect to LPC device
Serial Interface Signals Descriptions
I CMOS
NA
Selection straps to determine the BIOS boot device.
The Carrier should only float these or pull them low, please refer to
COM Express Module Base Specification Revision 2.1 for strapping options of BIOS disable signals.
LPC Signals Descriptions