Ab Signal Descriptions; Audio Signals; Analog Vga - ADLINK Technology COM Express Express-BL User Manual

3.3.

AB Signal Descriptions

3.3.1.

Audio Signals

Signal Pin #
AC_RST# / A30
HDA_RST#
AC_SYNC / A29
HDA_SYNC
AC_BITCLK / A32
HDA_BITCLK
AC _SDOUT / A33
HDA_SDOUT
AC _SDIN[2:0] B28
HDA_SDIN[2:0] B29
B30
3.3.2.

Analog VGA

Signal Pin #
VGA_RED B89
VGA_GRN B91
VGA_BLU B92
VGA_HSYNC B93
VGA_VSYNC B94
VGA_I2C_CK B95
VGA_I2C_DAT B96
Description
Reset output to CODEC, active low.
Sample-synchronization signal to the CODEC(s).
Serial data clock generated by the external
CODEC(s).
Serial TDM data output to the CODEC.
Serial TDM data inputs from up to 3 CODECs.
Description
Red for monitor.
Analog DAC output, designed to drive a
37.5-Ohm equivalent load.
Green for monitor
Analog DAC output, designed to drive a
37.5-Ohm equivalent load.
Blue for monitor.
Analog DAC output, designed to drive a
37.5-Ohm equivalent load.
Horizontal sync output to VGA monitor
Vertical sync output to VGA monitor
DDC clock line (I²C port dedicated to identify
VGA monitor capabilities)
DDC data line.
I/O PU/PD
O 3.3VSB
O 3.3VSB
I/O 3.3VSB
O 3.3VSB PD 15K
I 3.3VSB
I/O PU/PD
O Analog
PD 150R
O Analog
PD 150R
O Analog
PD 150R
O 5V
O 5V
I/O OD 3.3V PU 2k2 3.3V
I/O OD 3.3V PU 2k2 3.3V
Express-BL
Comment
Boot strap pin, no external pull-up or
pull-down resistor on carrier board is
recommended to avoid change the
configuration of this signal
AC_SDIN0: supported
AC_SDIN1: supported
AC_SDIN2: supported
Comment
shall also be terminated on the
carrier with 150Ω resistor to
ground close to VGA connector
shall also be terminated on the
carrier with 150Ω resistor to
ground close to VGA connector
shall also be terminated on the
carrier with 150Ω resistor to
ground close to VGA connector
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