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Bits
Mnemonic
Field Name
⎯
7:6
Reserved
5
RDYCLR
Clear CODEC
Ready Bit
MICSEL
MIC Selection
4
Assert Warm
WRESET
3
Reset
WAKEUP
Enable Wake-up
2
LOWPWR
Enable AC-link
1
low-power mode
ENLINK
Enable AC-link
0
Clear CODEC Ready Bit (Initial value: 0, W1S)
W1C 0: No effect
1: Clear CODEC[1:0] ready bits
Note: This bit should only be written to reevaluate the CODEC ready status after power-
down command is sent to CODEC.
MIC Selection. (Initial value: 0, R/W1S)
R
0: Indicates that PCM L&R (Slot 3&4) is selected for audio reception.
1: Indicates that MIC (Slot 6) is selected for audio reception.
W1S
0: No effect
1: Selects MIC (Slot 6) for audio reception.
Assert Warm Reset. (Initial value: 0, R/W1S)
R
0: Indicates that warm reset is not asserted.
1: Indicates that warm reset is asserted.
W1S
0: No effect
1: Asserts warm reset.
Note 1: Do not assert warm reset during normal operation.
Note 2: The software must guarantee the warm reset assertion time meets the AC'97
specification (1.0 µs or more).
Enable Wake-up. (Initial value: 0, R/W1S)
R
0: Indicates that wake-up from low-power mode is disabled.
1: Indicates that wake-up from low-power mode is enabled. While any SDIN signal
is driven high, ACLC asserts ACLCPME interrupt request to the interrupt
controller.
W1S
0: No effect
1: Enables wake-up from low-power mode.
Note: Do not enable wake-up during normal operation.
Enable AC-link Low-power Mode. (Initial value: 0, R/W1S)
R
0: SYNC and SDOUT signals are not forced to low.
1: SYNC and SDOUT signals are forced to low.
W1S
0: No effect
1: Forces SYNC and SDOUT signals low.
Note: Do not enable AC-link low-power mode during normal operation.
Enable AC-link. (Initial value: 0, R/W1S)
R
0: Indicates that the ACRESET* signal to AC-link is asserted.
1: Indicates that the ACRESET* signal to AC-link is not asserted.
W1S
0: No effect
1: Deasserts the ACRESET* signal to AC-link
Note: The software must guarantee the ACRESET* signal assertion time meets the AC'97
specification (1.0 µs or more).
Figure 14.4.1 ACCTLEN Register (3/3)
14-19
Chapter 14 AC-link Controller
Description
⎯
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