AK4538 Datasheet, PDF (49/70 Pages) Asahi Kasei Microsystems – 16Bit DS CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4538]
Addr
05H
Register Name
Mode Control 2
R/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
FS2
FS1
FS0 HPRM HPLM HPM LOOP SPPS
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
SPPS: Speaker-amp Power-Save-Mode
0: Power Save Mode (Default)
1: Normal Operation
When the SPPS bit = “1”, the Speaker-amp is in power-save-mode and the SPP pin becomes Hi-z and SPN pin is
set to HVDD/2 voltage. When the PMSPK bit = “1”, this bit is valid. After the PDN pin changes from “L” to “H”,
the PMSPK bit is “0”, which powers down Speaker-amp
LOOP: Loopback ON/OFF
0: OFF (Default)
1: ON
When this bit is “1”, the ADC output is passed to the DAC input internally. The external input data to DAC is
ignored.
HPM: Mono output select of Headphone
0: Stereo (Default)
1: Mono.
When the HPM bit = “1”, (L+R)/2 signals are output to Lch and Rch of the Headphone-amp.
HPLM: Lch of HP-Amp output control
0: Enable output from Rch of Headphone-amp (Default)
1: Lch mono output of Headphone-amp. The PMHPR bit can be powered down at this time.
HPRM: Rch of HP-Amp output control
0: Enable output from Lch of Headphone-amp (Default)
1: Rch mono output of Headphone-amp. The PMHPL bit can be powered down at this time.
Output Channel
Lch
Rch
L
R
L
-
-
R
(L+R)/2
(L+R)/2
(L+R)/2
-
-
(L+R)/2
Register bit
PMHPL PMHPR HPL
HPR
1
1
0
0
1
0
0
1
0
1
1
0
1
1
0
0
1
0
0
1
0
1
1
0
Table 25. Output control for Headphone-amp
HPM
0
0
0
1
1
1
FS2-0: Sampling frequency modes (see Table 3 and Table 7)
Default: “000” (fs=44.1kHz)
HPLM
0
1
0
0
1
0
HPRM
0
0
1
0
0
1
MS0198-E-01
- 49 -
2003/5