CSP1027 Datasheet, PDF (18/64 Pages) Agere Systems – CSP1027 Voice Band Codec for Cellular Handset and Modem Applications

CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
Data Sheet
December 1999
4 Architectural Information (continued)
The procedure for selecting M, S, and N is illustrated in Section 7.5 on page 45. The ranges for the programmable
dividers are summarized in Table 2.
Table 2. Programmable Divider Summary
Clock Ratio ICLK/ICLK0
Variable Name
CDIV0
Range of Values
1, 2
Encoding
0, 1
ICLK0/CKOS
M
±
---^N------
125
1, 2 to 64.496
See Tables 3
through 5.
ICLK0/CKS
125M ± N
125, 250 to 8062
See Tables 3
through 5.
ICLK/CKO2
CDIV2
Off, 1 to 31
0 to 31
ICLK0/CKO1
CDIV1
Off, 1 to 31
0 to 31
Table 3. CDIV3 Value for Each M
M
CDIV3
1
00 0001
2
00 0010
.
.
.
.
62
11 1110
63
11 1111
64
00 0000
Table 4. CDIFS Value for Each S
S
CDIFS
+1
0
–1
1
18
Lucent Technologies Inc.