
ASAHI KASEI 
[AK4702EQ] 
MS0424-E-00 
2005/09 
- 25 - 
Register Map
Addr 
Register Name 
D7 
D6 
D5 
D4 
D3 
D2 
D1 
D0 
00H 
01H 
02H 
03H 
Control 
Switch 
Main Volume 
Zerocross 
DEM1 
DEM0 
DIF1 
DIF0 
0 
0 
MUTE 
STBY 
VMUTE 
MMON
VCR1 
VCR0 
MONO 
VOL 
TV1 
TV0 
0 
0 
L5 
L4 
L3 
L2 
L1 
L0 
0 
0 
CAL 
DVOL1 
DVOL0 
ZERO 
ZTM1 
ZTM0 
04H 
Video Switch 
VRF1 
VRF0 
VVCR2 
VVCR1 
VVCR0 
VTV2 
VTV1 
VTV0 
05H 
Video output enable 
CIO 
TVFB 
VCRC 
VCRV 
TVB 
TVG 
TVR 
TVV 
06H 
Video Volume/Clamp 
0 
VCLP1
VCLP0 
0 
CLAMP1
CLAMP0 
VVOL1 
VVOL0
07H 
S/F Blanking control 
SBIO1 
SBIO0 
SBV1 
SBV0 
SBT1 
SBT0 
FB1 
FB0 
08H 
S/F Blanking monitor 
0 
0 
0 
0 
0 
FVCR 
SVCR1 
SVCR0
When the PDN pin goes “L”, the registers are initialized to their default values. 
While the PDN=“H”, all registers can be accessed. 
Do not write any data to the register over 08H. 
 Register Definitions
Addr 
Register Name 
00H 
Control 
R/W 
default 
STBY: Standby control 
  0   :  Normal Operation 
1  :  Standby Mode(default). All registers are not initialized. 
DAC        : powered down and timings are reset. 
Gain of Volume#1   : fixed to 0dB, 
Source of TVOUT    : fixed to VCRIN, 
Source of VCROUT  : fixed to TVIN, 
Source of MONOOUT  : fixed to VCRIN, 
Source of TVVOUT  : fixed to VCRVIN(or Hi-Z), 
Source of TVRC    : fixed to VCRRC(or Hi-Z), 
Source of TVG     : fixed to VCRG(or Hi-Z), 
Source of TVB     : fixed to VCRB(or Hi-Z), 
Source of VCRVOUT   : fixed to TVVIN(or Hi-Z), 
Source of VCRC   : fixed to Hi-Z or VSS(controlled by CIO bit). 
MUTE: Audio output control 
  0  : Normal Operation 
  1  : ALL Audio outputs to GND (default) 
DIF1-0: Audio data interface format control 
  00  :  16bit LSB Justified 
  01  :  18bit LSB Justified 
  10  :  18bit MSB Justified 
  11  :  18bit I
2
S Compatible (Default) 
DEM1-0: De-emphasis Response Control 
  00  :  44.1kHz 
  01  :  off (Default) 
  10  :  48kHz 
  11  :  32kHz
D7 
D6 
D5 
DIF1 
D4 
DIF0 
D3 
0 
D2 
0 
D1 
D0 
DEM1 
DEM0 
MUTE 
STBY 
R/W 
0 
1 
1 
1 
0 
0 
1 
1