CSP1027 Datasheet, PDF (61/64 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)
11.5 Serial Multiprocessor Communication
IOCK
t27
t25
VIH–
SYNC _VIL–
VOH–
DO/DI _VOL–
SADD
t26
t27
t28
B0
t30
B15 B14 B8
B7
B0
t31
AD0 AD1 AD7 AS0 AS7
t32
t29
B15
t33
AD0
Figure 44. SIO Multiprocessor Timing Diagram
5-7623 (F)
Table 32. Timing Requirements for Multiprocessor Communication
Abbreviated
Reference
t25
t26
t27
Parameter
Sync High Setup (high to high)
Sync Low Setup (low to high)
Sync Hold (high to invalid)
5.0 V
Min Max
10 —
22 —
2
—
3.3 V
Min Max
16
—
35
—
0
—
3.0 V
Unit
Min Max
23 — ns
44 — ns
0
— ns
Table 33. Timing Characteristics for Multiprocessor Communication
Abbreviated
Reference
t28
t29
t30
t31
t32
t33
Parameter
Data Delay (bit 0 only) (low to valid)
Data Disable Delay (high to 3-state)
Address Delay (bit 0 only) (low to valid)
Address Delay (high to valid)
Address Hold (low to valid)
Address Disable Delay (high to 3-state)
5.0 V
Min Max
— 24
— 18
— 26
— 22
2
—
— 18
Note: Capacitance load on DO, SYNC, and SADD = 100 pF.
3.3 V
Min Max
—
48
—
26
—
50
—
40
2
—
—
28
3.0 V
Unit
Min Max
— 55 ns
— 35 ns
— 57 ns
— 48 ns
2
— ns
— 35 ns
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