User's Manual
Table Of Contents
- Document History
- Introduction
- Product Concept
- Application Interface
- Operating Modes
- Power Supply
- Power Up / Power Down Scenarios
- Automatic GPRS Multislot Class Change
- Charging Control
- Summary of State Transitions (Except SLEEP Mode)
- RTC Backup
- SIM Interface
- Serial Interface ASC0
- Serial Interface ASC1
- USB Interface
- I2C Interface
- Audio Interfaces
- Control Signals
- Antenna Interface
- Electrical, Reliability and Radio Characteristics
- Mechanics
- Sample Application
- Reference Approval
- Appendix
TC63 Hardware Interface Description
Strictly confidential / Draft
s
TC63_HD_V00.432 Page 57 of 97 11.05.2005
3.13.4 Digital Audio Interface DAI
The DAI can be used to connect audio devices capable of PCM (Pulse Code Modulation), for
example a codec.
Table 10: Overview of DAI pin functions
Signal name on
B2B connector
Function for PCM Interface Input/Output
DAI0 TXDAI O
DAI1 RXDAI I
DAI2 FS (Frame sync) O
DAI3 BITCLK O
DAI4 nc I
DAI5 nc I
DAI6 nc I
To clock input and output PCM samples the PCM interface delivers a bit clock (BITCLK)
which is synchronous to the GSM system clock. The frequency of the bit clock is 128±1kHz.
The frame sync signal (FS) has a frequency of 8kHz and is high for one BITCLK period. The
PCM interface is master for the bit clock and the frame sync signals.
BITCLK
FS
TXDAI
RXDAI
bitclk
frame sync
TX_data
RX_data
Codec
PCM interface of
the GSM module
Figure 23: PCM interface application