
Agere Systems Inc.
29
Data Sheet
January 2002
CSP1027 Voice Band Codec for
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
Field
Reg
13
12
11
10—6
CDIF2
5—0
CDIF1
TSTPOR
HPFE
DITHER
Field
Reg
TSTPOR
Value
11
0*
1
0*
1
0*
1
0 0000*
0 0000
0 0000
W WWWW
00 0000*
10 0110
11 0110
WW WWWW
Description
Indicates control register 0.
Normal operation.
Test on-chip power-on reset pulse generator.
Enable high-pass filter in A/D and D/A.
Disable high-pass filter in A/D and D/A.
Enable dither on D/A converter.
Disable dither on D/A converter.
Sampling rate, CK
S
= ICLK0 ÷ (CDIV3 x 125).
Sampling rate, CK
S
= ICLK0 ÷ 256. (
Note:
CDIV3 must be set to 2.)
Sampling rate, CK
S
= ICLK0 ÷ 1458. (
Note:
CDIV3 must be set to 12.)
Sampling rate, CK
S
= ICLK0 ÷ (125 x M + S x N). See Section 4.5 on page 16.
Sampling rate, CK
S
= ICLK0 ÷ (CDIV3 x 125).
Sampling rate, CK
S
= ICLK0 ÷ 256. (
Note:
CDIV3 must be set to 2.)
Sampling rate, CK
S
= ICLK0 ÷ 1458. (
Note:
CDIV3 must be set to 12.)
Sampling rate, CK
S
= ICLK0 ÷ (125 x M + S x N). See Section 4.5 on page 16.
* Value upon reset.
HPFE
DITHER
CDIF2
CDIF1