7

INDUSTRIAL TEMPERATURE RANGE

IDT821034 QUAD PCM CODEC WITH PROGRAMMABLE GAIN

Table 1. Description of Configuration Register

Table 2. Definition of Time Slot Register

Table 3. Relationship between BCLK Frequency and Time Slot Number

Bit

Name

Description

7

Register Indicator

Always ‘0’

6

5

4

3

2

1

0

Time Slot Bit 6

Time Slot Bit 5

Time Slot Bit 4

Time Slot Bit 3

Time Slot Bit 2

Time Slot Bit 1

Time Slot Bit 0

Bit 6-0 indicate which time slot is selected for the transmit/receive channel. Time

Slot 0 is aligned to FS.

BCLK Frequency

512 kHz

1.544 MHz

2.048 MHz

4.096 MHz

8.192 MHz

Number of Time Slot

8

24

32

64

128

Bit

Name

Value

Description

CR.7

Register Indicator

Always ‘1’

CR.6

CR.5

Mode Select 1

Mode Select 0

00

01

10

11

µ-Law CODEC Mode (This is global setting for all channels.)

A-Law CODEC Mode (This is global setting for all channels.)

SLIC/Gain Mode

Reserved (This mode should not be programmed for normal operation.)

CODEC Mode (CR.6 = ‘0’)

Timing Mode Select

0

1

Non-delay Mode (This is global setting for all channels.)

Delay Mode (This is global setting for all channels.)

CR.4

SLIC/Gain Mode (CR.6 = ‘1’)

SLIC/Gain Mode Select

0

1

Gain Mode

SLIC Mode

CR.3

CR.2

Channel Address 1

Channel Address 0

00

01

10

11

Select Channel 0 for CODEC or SLIC programming

Select Channel 1 for CODEC or SLIC programming

Select Channel 2 for CODEC or SLIC programming

Select Channel 3 for CODEC or SLIC programming

CODEC Mode (CR.6 = ‘0’)

Transmitter Select

Receiver Select

00

01

10

11

Channel power down

Channel power up with receive time slot assignment

Channel power up with transmit time slot assignment

Channel power up with both receive and transmit time slot assignment

SLIC Mode (CR.6 = ‘1’, CR.4 = ‘1’)

I/O_1 Configuration

I/O_0 Configuration

00

01

10

11

Configure I/O_1 as an output pin and I/O_0 as an output pin

Configure I/O_1 as an output pin and I/O_0 as an input pin

Configure I/O_1 as an input pin and I/O_0 as an output pin

Configure I/O_1 as an input pin and I/O_0 as an input pin

CR.1: Transmit/Receive

Select

0

1

Receive gain will be adjusted

Transmit gain will be adjusted

CR.1

CR.0

Gain Mode (CR.6 = ‘1’, CR.4 = ‘0’)

CR.0: MSB/LSB Select

0

1

Indicates the following 8 bits contain the 7 Least Significant bits of gain

adjustment coefficient

Indicates the following 8 bits contain the 7 Most Significant bits of gain

adjustment coefficient