AK4640_05 Datasheet, PDF (53/78 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4640]
Addr
05H
Register Name
Mode Control 2
R/W
Default
D7
D6
D5
D4
FS2
FS1
FS0
0
R/W
R/W
R/W
RD
0
0
0
0
D3
D2
D1
D0
0
HPM LOOP SPPS
RD
R/W
R/W
R/W
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.
FS2-0: Sampling frequency modes (Table 3, Table 7)
Default: “000” (fs=44.1kHz)
MS0273-E-02
- 53 -
2005/04