CSP1027 Datasheet, PDF (26/64 Pages) Agere Systems – CSP1027 Voice Band Codec for Cellular Handset and Modem Applications

CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
5 Register Information
Tables 7 through 10 describe the programmable registers of the CSP1027 device.
5.1 Codec I/O Control 0 (cioc0) Register
Table 7. Codec I/O Control 0 (cioc0) Register
Bit
Field
15—14
Reg
13
TEST
12
ACTIVE
11—8
OGSEL
7
MUTE
6
IRSEL
Field
Reg
TEST
ACTIVE
OGSEL
MUTE
IRSEL
INSEL
CDIV2
Value
00
0*
1
0*
1
1111
1110
1101
.
.
.
0001
0000*
0*
1
0*
1
0*
1
0 0000
0 0001
0 0010
.
.
.
1 0000*
.
.
.
1 1110
1 1111
Description
Indicates control register 0.
Normal operation.
Testability mode—analog and digital loopback.
Codec set to inactive mode (i.e., powerdown).
Codec set to active mode.
Output gain adjustment of 0 dB.
Output gain adjustment of –3 dB.
Output gain adjustment of –6 dB.
.
.
.
Output gain adjustment of –42 dB.
Output gain adjustment of –45 dB.
Output signal muted.
Output signal not muted.
Microphone preamplifier input range: 500 mVp.
Microphone preamplifier input range: 160 mVp.
Select microphone input, MICIN.
Select auxiliary input, AUXIN.
Output clock 2, CKO2, disabled.
Output clock 2, CKO2 = ICLK ÷ 1.
Output clock 2, CKO2 = ICLK ÷ 2.
.
.
.
Output clock 2, CKO2 = ICLK ÷ 16.
.
.
.
Output clock 2, CKO2 = ICLK ÷ 30.
Output clock 2, CKO2 = ICLK ÷ 31.
* Value upon reset.
Data Sheet
December 1999
5
INSEL
4—0
CDIV2
26
Lucent Technologies Inc.