Samsung S5PC100 User Manual page 1694

S5PC100 USER'S MANUAL (REV1.0)
3.7 AC97 STATE DIAGRAM
This is the state diagram of AC97 controller. It is helpful to understand AC97 controller state machine. State
above figure is synchronized by peripheral clock (PCLK). It is able to monitor state at AC_GLBSTAT register.
IDLE
1
9
INIT
9
2
READY
: PCLK rising
1
: ACLINK_ON
2
: CODEC_READY & TRANS_DATA & NORMAL_SYNC
3
: ~CODEC_READY | ~TRANS_DATA
4
: !ACLINK_ON
5
: POWER_DOWN
6
: WARM_RESET
7
: CODEC_WAKEUP
8
: COLD_RESET | ~PRESETn
9
Figure 10.4-9 AC97 State Diagram
9
8
9
9
5
ACTIVE
4
3
AC97 CONTROLLER
WARM
7
6
LP
10.4-11