
ASAHI KASEI 
[AK4707] 
MS0551-E-00 
2006/10 
- 29 - 
Register Map
Addr 
Register Name 
00H 
Control 
01H 
Switch 
02H 
Main Volume 
03H 
Zerocross 
04H 
Video switch 
05H 
Video output enable 
06H 
Video clamp 
07H 
S/F Blanking control 
08H 
S/F Blanking monitor 
09H 
Monitor mask 
When the PDN pin goes “L”, the registers are initialized to their default values. 
While the PDN pin = “H”, all registers can be accessed. 
Do not write any data to the register over 09H. 
Register Definitions
Addr 
Register Name 
D7 
00H 
Control 
0 
R/W 
Default 
0 
STBY: Standby control 
0: Normal Operation 
1: Standby Mode (default). All registers are not initialized. 
Source of TVOUT   : fixed to VCRIN, 
Source of VCROUT  : fixed to TVIN 
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 TVFB    : fixed to VCRFB (or Hi-Z), 
Source of TVSB    : fixed to VCRSB. 
BIAS: Audio output control 
0: Normal operation 
1: ALL Audio outputs to GND (default) 
AUTO: Auto startup bit 
0: Auto startup disable (Manual startup). 
1: Auto startup enable (default). 
Note 23.  When the SBIO1 bit = “1”(default = “0”), the change of AUTO bit may cause a “L” pulse on INT pin. 
D7 
0 
D6 
0 
0 
0 
D5 
0 
VCR1 
L2 
0 
VVCR2
0 
VCLP0 
SBV1 
0 
0 
D4 
0 
VCR0 
L1 
0 
VVCR1
VCRV 
0 
SBV0 
TVMON
MTV 
D3 
D2 
0 
0 
1 
ZERO 
VTV2 
TVG 
CLAMP0 
SBT0 
FVCR 
MFVCR 
D1 
BIAS 
TV1 
1 
ZTM1 
VTV1 
TVR 
0 
FB1 
SVCR1 
MSVCR
D0 
STBY 
TV0 
1 
ZTM0
VTV0 
TVV 
0 
FB0 
SVCR0
0 
AUTO 
MONO 
L0 
0 
VVCR0
TVB 
CLAMP1
SBT1 
VCMON
MVC 
MUTE 
0 
0 
0 
0 
0 
SBIO1 
0 
MCOMN 
VMONO
0 
TVFB 
VCLP1 
SBIO0 
0 
0 
D6 
0 
D5 
0 
D4 
0 
D3 
D2 
0 
D1 
BIAS 
D0 
STBY
AUTO 
R/W 
0 
0 
0 
1 
0 
1 
1