AK4665A Datasheet, PDF (33/52 Pages) Asahi Kasei Microsystems – 20-Bit Stereo CODEC with MIC/HP-AMP

ASAHI KASEI
[AK4665A]
„ Transition Time
The power-up/down time of HP-Amp at the change of PMHPL/R bits is set by PUT1-0 bits (Table 38).
The mute ON/OFF timing of HP-Amp, the ON/OFF timing of output path for HPL/HPR and LOUT/ROUT, and the gain
changing at ALC2 recovery operation are changed by the soft transition respectively. The transition time is set by PTS1-0
bits (Table 39). The register value of same address must be changed by an interval more than transition time.
The Enable/Disable for the soft transition is set by MOFF0, MOFF8 and MOFF9 bits (Table 37). The soft transition is
disabled while these bits are “1”, and ON/OFF is done immediately.
As shown in Table 37, if the soft transition is enabled, the register value of same address must be changed by an interval
more than transition time. The write operation is ignored if the same values are written as the previous write operation.
PUT1-0 bits
PTS1-0 bits
Address
00H
08H
09H
Register Name
PMHPL, PMHPR bits
DACHL, LINHL, MINHL, DACHR, RINHR, MINHR,
HPMTN bits
DACL, LINL, RINR, MINL, DACR, MINR bits
Table 37. Registers with Transition Time
Enable/Disable
MOFF0 bit
MOFF8 bit
MOFF9 bit
FS3 FS2 FS1 FS0
0000
0001
0010
1000
1001
1010
1100
1101
1110
Others
Power-up/down Time
PUT=00
PUT=01
PUT=10
(Default)
770/fs (17.5ms) 1538/fs (34.9ms) 3074/fs (69.7ms)
514/fs (16.1ms) 1026/fs (32.1ms) 2050/fs (64.1ms)
770/fs (16.1ms) 1538/fs (32.1ms) 3074/fs (64.1ms)
386/fs (17.5ms) 770/fs (34.9ms) 1538/fs (69.8ms)
258/fs (16.1ms) 514/fs (32.1ms) 1026/fs (64.1ms)
386/fs (16.1ms) 770/fs (32.1ms) 1538/fs (64.1ms)
194/fs (17.6ms) 386/fs (35.0ms) 770/fs (69.8ms)
130/fs (16.3ms) 258/fs (32.3ms) 514/fs (64.3ms)
194/fs (16.2ms) 386/fs (32.2ms) 770/fs (64.2ms)
N/A
Table 38. HP-Amp Power-up/down Time
PUT=11
6146/fs (139ms)
4098/fs (128ms)
6146/fs (128ms)
3074/fs (139ms)
2050/fs (128ms)
3074/fs (128ms)
1538/fs (140ms)
1026/fs (128ms)
1538/fs (128ms)
Default
FS3 FS2 FS1 FS0
PTS=00
Transition Time
PTS=01
PTS=10
PTS=11
(Default)
0 0 0 0 768/fs (17.4ms) 1536/fs (34.8ms) 3072/fs (69.7ms) 6144/fs (139ms) Default
0 0 0 1 512/fs (16.0ms) 1024/fs (32.0ms) 2048/fs (64.0ms) 4096/fs (128ms)
0 0 1 0 768/fs (16.0ms) 1536/fs (32.0ms) 3072/fs (64.0ms) 6144/fs (128ms)
1 0 0 0 384/fs (17.4ms) 768/fs (34.8ms) 1536/fs (69.7ms) 3072/fs (139ms)
1 0 0 1 256/fs (16.0ms) 512/fs (32.0ms) 1024/fs (64.0ms) 2048/fs (128ms)
1 0 1 0 384/fs (16.0ms) 768/fs (32.0ms) 1536/fs (64.0ms) 3072/fs (128ms)
1 1 0 0 192/fs (17.4ms) 384/fs (34.8ms) 768/fs (69.7ms) 1536/fs (139ms)
1 1 0 1 128/fs (16.0ms) 256/fs (32.0ms) 512/fs (64.0ms) 1024/fs (128ms)
1 1 1 0 192/fs (16.0ms) 384/fs (32.0ms) 768/fs (64.0ms) 1536/fs (128ms)
Others
N/A
Table 39. HP-Amp Mute ON/OFF, Path ON/OFF & ALC2 Recovery Transition Time
MS0440-E-01
- 33 -
2006/05