AK4691 Datasheet, PDF (35/80 Pages) Asahi Kasei Microsystems – 4ch ADC + 2ch DAC with MIC/HP/SPK-AMP

[AK4691]
PMADC2 -1 bits
PMDAC
bit
LOOP1-0 bits
(Note 50)
Status
Digital
EQ/HPF/LPF
00
0
x
1
x
Power-down
Playback
Power-down
Playback path
01, 10 or 11
0
1
x
Recording
Recording path
00
Recording & Playback
Recording path
01
1
01, 11
Recording Monitor Playback
(ADC1 Æ DAC)
Recording path
10
Recording & Playback
Recording path
01
Recording & Playback
Recording path
10
1
10, 11
Recording Monitor Playback
(ADC2 Æ DAC)
Recording path
Recording path
Recording (ADC2)
01, 11
Recording Monitor Playback Recording path
11
1
(ADC1 Æ DAC)
Recording (ADC1)
10
Recording Monitor Playback Recording path
(ADC2 Æ DAC)
Note 50. When LOOP1-0 bits = “10”, TDM mode (DIF1-0 bits = “00”) is not supported.
Note 51. Stereo emphasis circuit in ADC1 and ADC2 is effective only at stereo operation.
Table 23. Digital EQ/HPF/LPF Circuit Setting (x: Don’t care)
(default)
When the below recording channels (PMADC2-1 bits = “01” Î PMADC2-1 bits = “10” or PMADC2-1 bits = “10” Î
PMADC2-1 bits = “01”) are changed at PMDAC bit = “1, PMADC1 = PMADC2 bits = “11” should be set more than 2/fs.
<Example of Sequence>
a. PMADC2-1 bits = “01” (“10”)
b. PMADC2-1 bits = “11”
c. Delay ( ≥ 2/fs )
d. PMADC2-1 bits = “10” (“01”)
MS0672-E-00
- 35 -
2007/11