Electrical Specifications

32579B

9.3.14Audio Interface Timing (AC97)

Table 9-38. AC Reset Timing Parameters

Symbol

Parameter

Min

Typ

Max

Unit

Comments

 

 

 

 

 

 

 

tRST_LOW

AC97_RST# active low pulse width

1.0

 

 

µs

 

tRST2CLK

AC97_RST# inactive to BIT_CLK

162.8

 

 

ns

 

 

startup delay

 

 

 

 

 

 

 

 

 

 

 

 

tRST2CLK

tRST_LOW

AC97_RST#

BIT_CLK

Figure 9-48. AC97 Reset Timing Diagram

Table 9-39. AC97 Sync Timing Parameters

Symbol

Parameter

Min

Typ

Max

Unit

Comments

 

 

 

 

 

 

 

tSYNC_HIGH

SYNC active high pulse width

 

1.3

 

µs

 

tSYNC_IA

SYNC inactive to BIT_CLK startup

162.8

 

 

ns

 

 

delay

 

 

 

 

 

 

 

 

 

 

 

 

tSYNC_IA

tSYNC_HIGH

SYNC

BIT_CLK

Figure 9-49. AC97 Sync Timing Diagram

AMD Geode™ SC1200/SC1201 Processor Data Book

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AMD SC1201, SC1200 manual Audio Interface Timing AC97 38. AC Reset Timing Parameters, AC97RST# active low pulse width