Phytec phyCORE-PXA255, Hardware Manual

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AC97 and Touch Controller
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PHYTEC Meßtechnik GmbH 2004 L-657e_0
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12 AC97 Interface and Touch Controller
The PXA255 controller feataures an AC97 interface for controlling
sound decoders such as the WM9712L from Wolfson. The WM9712L
also has an integrated touch controller.
Ethernet
2 * USB
Host
USB
Client
Power
Socket
AC97
IN MIC OUT
Expansion Board
FF-UART BT-UART
Touch Connect
LCD
Touch Panel
RESET
Button
CAN
Figure 31: Sound and Touch Controller Interfaces
The sound decoder WM9712L is controlled via the controller’s AC97
interface. The SDATA_IN0 is used as the input channel. The second
channel is available on the AC97 expansion socket at X24.
Connection to other AC97 devices such as modems is possible via
this socket.
Signal A B Signal
VCC (3,3V)
1 2
VCC (3,3V)
/ENA_AC97
3 4
/ACRESET
SYNC
5 6
GND
BITCLK
7 8
GND
SDATA_OUT
9 10
GND
SDATA_IN0
11 12
GND
SDATA_IN1
13 14
GND
AC_INT
15 16
GND
Table 41: AC97 Expansion Socket at X24