CSP1027 datasheet(59/64 Pages) AGERE

59 / 64 page

Lucent Technologies Inc.

Data Sheet

CSP1027 Voice Band Codec for

December 1999

Cellular Handset and Modem Applications

11 Timing Characteristics and Requirements (continued)

11.4 Serial I/O Communication

Figure 42. Serial Input/Output Timing Diagram

Table 29. Timing Requirements for Serial Input/Output

Abbreviated

Reference

Parameter

5.0 V

3.3 V

3.0 V

Unit

Min

Max

Min

Max

Min

Max

t11

Clock Period (high to high)

—*

* 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).

—*

120

—*

t12

Clock Low Time (low to change)

—

t13

Clock High Time (high to change)

—

t14

Sync High Setup (high to high)

—

t15

Sync Low Setup (low to high)

—

t16

Sync Hold (high to invalid)

—

t17

Data Setup (valid to high)

—

t18

Data Hold (high to invalid)

—

t19

Address Setup (valid to high)

—

t20

Address Hold (high to invalid)

—

Table 30. Timing Characteristics for Serial Input/Output

Abbreviated

Reference

Parameter

5.0 V

3.3 V

3.0 V

Unit

Min

Max

Min

Max

Min

Max

t21

Data/Status Delay (high to valid)

—

t22

Data/Status Hold (high to invalid)

—

t11

t13

t12

t14

t16

t15

t16

t17

t18

t19

t20

t21

t22

t20

t18

SYNC

VIH–

VIL–

VIH–

VIL–

SADD

VIH–

VIL–

VOH–

VOL–

IOCK

VIH–

VIL–

B15

B14

AD0

AD1

AS0

AS7

B15

B14

5-7621 (F)

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