Specifications
CM-X300 CoM
38 CM-X300 Reference Guide Rev 1.31 30-Dec-2010
CM-X300 Signal
Name
Type
Description
CIF_FV
I/O
Frame start or alternate synchronization signal used by the sensor to signal
frame readout or as an external vertical sync. For CIF_PCLK speeds > 26
MHz, the sensor CIF_FSYNC signal must not be active until at least 2
pixel clocks after the last valid data of a frame.
This pin may be defined as GPIO52 in a camera-less application.
CIF_LV
I/O
Line start or alternate synchronization signal used by the sensor to signal
line readout or as an external horizontal sync. For CIF_PCLK speeds > 26
MHz, the sensor CIF_HSYNC signal must not be active until at least 2
pixel clocks after the last valid data of a line.
This pin may be defined as GPIO51 in a camera-less application.
3.3.13 Audio Subsystem
3.3.13.1 Audio I/O
The CM-X300 audio subsystem uses the Wolfson WM9715L as an AC‘97 Rev 2.2
compatible stereo codec. Its analog audio interfaces include stereo line output which may
also drive a 400mW speaker or 45mW headphone, mono microphone input and stereo line
input.
Table 36 Audio I/O Signals
CM-X300 Signal
Name
Type
Description
AUD-SPDIF
O
SPDIF Digital Audio Output
AUD-INL-MIC
AI
Left Line Input and Microphone Input
AUD-INR
AI
Right Line Input
AUD-OUTL
AO
Left Output (Speaker, Line or Headphone)
AUD-OUTR
AO
Right Output (Speaker, Line or Headphone)
3.3.13.2 AC’97 Bus
The AC‘97 bus is available on the same CAMI connector pins as the audio I/O signals,
when the ―AT‖ option is not engaged.
Table 37 AC’97 Bus Signals
CM-X300 Signal
Name
Type
Description
AUD-SPDIF/
AC97_RST#
O
Asynchronous, active-low CODEC reset. The CODEC registers arereset
when AC97_RST is asserted
AUD-INR/
AC97_SDOUT
O
Serial audio output data to CODEC, for digital-to-analog conversion
AUD-OUTL/
AC97_SDIN
I
Serial audio input data, from primary CODEC
AUD-INL-MIC/
AC97_BITCLK
I
12.288 MHz bit-rate clock
AUD-OUTR/
AC97_SYNC
O
48-kHz frame indicator and synchronizer
3.3.14 Touch Panel Interface
The CM-X300 features a resistive touchpanel interface. It has a 12-bit resolution and
supports 4-wire panels only.