Samsung S5PC110 Manual page 1883

S5PC110_UM
4.3.6.5 AC97 State Diagram
INIT
shows the state diagram of AC97 controller. It is useful to check AC97 controller state machine. State
Figure 4-9
machine shown in above figure is synchronized by peripheral clock (PCLK). Use AC_GLBSTAT register to
monitor state.
IDLE
1
9
9
2
READY
: PCLK rising
1
: ACLINK_ON
2
3 : CODEC_READY & TRANS_DATA & NORMAL_SYNC
: ~CODEC_READY | ~TRANS_DATA
4
: !ACLINK_ON
5
6
: POWER_DOWN
: WARM_RESET
7
: CODEC_WAKEUP
8
9 : COLD_RESET | ~PRESETn
Figure 4-9
9
8
9
5
ACTIVE
4
3
AC97 State Diagram
4 AC97 CONTROLLER
WARM
9
7
6
LP
4-11