AT85C51SND3Bx
Table 176. APELEV Register
APELEV (2.F7h) - Audio Processor Equalizer Level Status Register
7
6
5
4
3
2
1
0
-
-
-
EQLEV4
EQLEV3
EQLEV2
EQLEV1
EQLEV0
Bit
Bit
Number
Mnemonic Description
Reserved
7-5
4-0
-
The value read from these bits is always 0. Do not set these bits.
Equalizer Audio Level
EQLEV4:0
00000b: min. level to 11111b: max. level.
Reset Value = 0000 0000b
Table 177. ACCON Register
ACCON (2.EAh) – Audio Codec Control Register
7
6
5
4
3
2
1
0
-
AMBSEL
AMBEN
AISSEL
AIEN
AODRV -
AOSSEL -
AOEN -
Bit
Bit
Number
Mnemonic Description
Reserved
7
5
-
The value read from this bit is always 0. Do not set this bit.
Microphone Bias Select Bit
AMBSEL
AMBEN
AISSEL
AIEN
Set to select 1.5V bias output voltage in high or low voltage configuration.
Clear to select 2V bias output voltage in high voltage configuration.
Microphone Bias Enable Bit
5
4
3
Set to enable the microphone bias output.
Clear to disable the microphone bias output.
Audio Input Source Select Bit
Set to select the microphone as input source.
Clear to select the line inputs as input source.
Audio Input Enable Bit
Set to enable the audio input system.
Clear to disable the audio input system.
AT85C51SND3B2 and AT85C51SND3B3: Audio Output Drive Select Bit
Set to select the 32 Ω drive in high voltage configuration.
AODRV
-
Clear to select the 50 KΩ drive in high or low voltage configuration.
2
1
AT85C51SND3B1: Reserved
The value read from this bit is always 0. Do not set this bit.
AT85C51SND3B2 and AT85C51SND3B3: Audio Output Source Select Bit
Set to select the audio processor as output source.
Clear to select the line inputs as output source.
AOSSEL
-
AT85C51SND3B1: Reserved
The value read from this bit is always 0. Do not set this bit.
163
7632A–MP3–03/06
ATMEL [ ATMEL ]
