CSP1027 Datasheet, PDF (59/64 Pages) Agere Systems – CSP1027 Voice Band Codec for Cellular Handset and Modem Applications

Data Sheet
December 1999
CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
11 Timing Characteristics and Requirements (continued)
11.4 Serial I/O Communication
VIH–
IOCK _VIL–
VIH–
SYNC _VIL–
VIH–
DI _VIL–
VIH–
SADD _VIL–
VOH–
DO _VOL–
t11
t13
t12
t16
t14
t15
t16
t17
B15
t19
AD0
t21
B15
t18
B14 B8
t20
AD1 AS0
t22
B14 B8
t18
B0
t20
AS7
t22
B0
Figure 42. Serial Input/Output Timing Diagram
5-7621 (F)
Table 29. Timing Requirements for Serial Input/Output
Abbreviated
Reference
t11
t12
t13
t14
t15
t16
t17
t18
t19
t20
Parameter
Clock Period (high to high)
Clock Low Time (low to change)
Clock High Time (high to change)
Sync High Setup (high to high)
Sync Low Setup (low to high)
Sync Hold (high to invalid)
Data Setup (valid to high)
Data Hold (high to invalid)
Address Setup (valid to high)
Address Hold (high to invalid)
5.0 V
3.3 V
3.0 V
Unit
Min Max Min Max Min Max
50 —* 84 —* 120 —* ns
20
—
33
—
48
—
ns
20
—
33
—
48
—
ns
6
—
11
—
13
—
ns
9
—
15
—
20
—
ns
0
—
0
—
0
—
ns
6
—
11
—
13
—
ns
0
—
0
—
0
—
ns
9
—
15
—
20
—
ns
0
—
0
—
0
—
ns
* Device is fully static; t11 is tested at 100 ns. The frequency of IOCK must be greater than the frequency of the internal oversampling clock
CKOS (FCKOS).
Table 30. Timing Characteristics for Serial Input/Output
Abbreviated
Reference
t21
t22
Parameter
Data/Status Delay (high to valid)
Data/Status Hold (high to invalid)
5.0 V
3.3 V
3.0 V
Unit
Min Max Min Max Min Max
—
26
—
50
—
57
ns
2
—
2
—
2
—
ns
Lucent Technologies Inc.
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