CSP1027 datasheet(29/64 Pages) AGERE

29 / 64 page

Lucent Technologies Inc.

Data Sheet

CSP1027 Voice Band Codec for

December 1999

Cellular Handset and Modem Applications

5 Register Information (continued)

5.4 Codec I/O Control 3 (cioc3) Register

Table 10. Codec I/O Control 3 (cioc3) Register

Bit

15—14

10—6

5—0

Field

Reg

TSTPOR

HPFE

DITHER

CDIF2

CDIF1

Field

Value

Description

Reg

Indicates control register 0.

TSTPOR

* Value upon reset.

Normal operation.

Test on-chip power-on reset pulse generator.

HPFE

Enable high-pass filter in A/D and D/A.

Disable high-pass filter in A/D and D/A.

DITHER

Enable dither on D/A converter.

Disable dither on D/A converter.

CDIF2

0 0000*

Sampling rate, CKS = ICLK0 ÷ (CDIV3 x 125).

0 0000

Sampling rate, CKS = ICLK0 ÷ 256. (Note: CDIV3 must be set to 2.)

0 0000

Sampling rate, CKS = ICLK0 ÷ 1458. (Note: CDIV3 must be set to 12.)

W WWWW

Sampling rate, CKS = ICLK0 ÷ (125 x M + S x N). See Section 4.5 on page 16.

CDIF1

00 0000*

Sampling rate, CKS = ICLK0 ÷ (CDIV3 x 125).

10 0110

Sampling rate, CKS = ICLK0 ÷ 256. (Note: CDIV3 must be set to 2.)

11 0110

Sampling rate, CKS = ICLK0 ÷ 1458. (Note: CDIV3 must be set to 12.)

WW WWWW

Sampling rate, CKS = ICLK0 ÷ (125 x M + S x N). See Section 4.5 on page 16.

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