User's Manual

AnyDATA.NET Inc. AnyTime AnyPlace Any Wireless Data Solution
TM
4.2.2 Extended CODEC Interface
The PCM CODEC interface is used for the car-kit audio system. This interface is optional.
External CODEC interface signals are listed below:
Table 4-2 Digital CODEC Pinouts
NAME DESCRIPTION PINOUTS
AUX_PCM_CLK
PCM Clock Pin No. 13
AUX_PCM_DIN PCM Data Input Pin No. 9
AUX_PCM_DOUT PCM Data Output Pin No. 11
AUX_PCM_SYNC PCM Sync. Pin No. 14
4.3 UART Interface
4.3.1 Primary UART interface
The Universal Asynchronous Receiver Transmitter (UART) communicates with serial data that
conforms to the RS-232 Interface protocol. The module provides 3.0V CMOS level outputs and 3.0V
CMOS switching input levels. In addition, all inputs have a 5.0V tolerance, however 3.0V or 3.3V CMOS
logic compatible signals are highly recommended.
All the control signals of the RS-232 are active low, however the data signals, RXD and TXD, are
active high.
The UART has a 64 byte transmit (TX) FIFO and a 64 byte receive (RX) FIFO. The UART features
hardware handshaking, programmable data sizes, programmable stop bits, and odd, even, no parity. The
UART operates at a maximum bit rate of 115.2kbps.
Table 4-3 UART Interface Pinouts
NAME
DESCRIPTION CHARACTERISTIC
DP_DCD/
Data Carrier Detect Network connected from the module
DP_RI/
Ring Indicator Output to host indicating coming call
DP_RFR/
Ready for Receive Ready for receive from host
DP_TXD
Transmit Data Output data from the module
DP_DTR/
Data Terminal Ready Host ready signal
DP_RXD
Receive Data Input data to the module
DP_CTS/ Clear to Send Clear to send to the host
GND Signal Ground Signal ground
Reference Plane: DT2000 Dual
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AD-2001-06-28 Ver 1.1
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