AMD Geode™ SC2200 Processor Data Book 431
Electrical Specifications 32580B
Figure 9-49. AC97 Clocks DiagramTable 9-38. AC97 Clocks Parameters
Symbol Parameter Min Typ Max Unit Comments
FBIT_CLK BIT_CLK frequency 12.288 MHz
tCLK_PD BIT_CLK period 81.4 ns
tCLK_J BIT_CLK output jitter 750 ps
tCLK_H BIT_CLK high pulse width 32.56 40.7 48.84 ns Note 1
tCLK_L BIT_CLK low pulse width 32.56 40.7 48.84 ns Note 1
FSYNC SYNC frequency 48.0 KHz
tSYNC_PD SYNC period 20.8 µs
tSYNC_H SYNC high pulse width 1.3 µs
tSYNC_L SYNC low pulse width 19.5 µs
FAC97_CLK AC97_CLK frequency 24.576 MHz
tAC97_CLK_PD AC97_CLK period 40.7 ns
tAC97_CLK_D AC97_CLK duty cycle 45 55 %
tAC97_CLK_FR AC97_CLK fall/rise time 2 5 ns
tAC97_CLK_J AC97_CLK output edge-to-
edge jitter
100 ps Measured from edge to edge
Note 1. Worst case duty cycle restricted to 40/60.
BIT_CLK
SYNC
tCLK_PD
tCLK_H
tCLK_L
tSYNC_H
tSYNC_L
tSYNC_PD
tAC97_CLK_FR
VOHD
VOLD
tAC97_CLK_PD
AC97_CLK