AV2188 Datasheet, PDF (9/20 Pages) List of Unclassifed Manufacturers – Multi-Channel Audio CODEC

AV2188
INFINITE ZERO DETECTION
The AV2188 has an Infinite Zero Detection circuit which detects zero in the Audio Serial Port that lasts for
approximately 0.5 sec. By default, the zero detection circuit is on. To disable this feature, bit 7 of the programmable
register TREG1[7] must be programmed to a “one”.
SERIAL COMMAND PORT
The user can use the pin to select the chip operation or by programming the internal control registers through the 7
bit address I²C port. The Chip Address for the AV2188 is 31H. The protocal for write operation consists of sending
3 byte data to AV2188, following each byte are the acknowledges generated by AV2188. The first byte is the 7-bit
Chip Address followed by the read/write bit (read is high write is low). The second byte is the control register
address. The third byte is the control register data.
Upon power up, all programmable registers are set to default values. Figure 4 describes the serial command port
timing relationship.
Figure 4. Serial Command Port Timing
I²C Bus Control Register write example:
Start CA6
SDA
11
SCL
CA0 R/W ACK A7
1
A0 ACK D7
D0 ACK Stop
Chip adrress: CA<6:0> = 31H
Register address: A<7:0> = 00H
DATA: D<7:0> = 30H
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June 2, 2000