P.70
D1
D2
D3
D4
D5-7 Reserved
Select 600-line Extended CRT vertical group registers
Enable horizontal expansion for text mode
Enable horizontal expansion for graphic mode
Enable TV equalizing pulse
Bit 0
This bit is used to select the flat panel resolution .(for vertical expansion and horizontal centering)
0 :
640x flat panel size
1 :
800x flat panel size
This bit is used to select the extended vertical timing set register group when the bit-1 of
CREG AC(Enable extended vertical timing) was set to logical 1 and the bit-6,7 of
MISCREG were set to 1,1. The more description is in CREG AC bit-1 description.
0 :
Use the 480-line vertical timing CRT regs. CREG B6-BC
1 :
Use the 600-line vertical timing CRT regs. CREG C7-CD
A logical 1 forces TP6508 to fit the panel horizontal resolution for text mode.
A logical 1 forces TP6508 to fit the panel horizontal resolution for graphic mode.
This bit is used to select the TV composit signal generated type.
0 :
No equalizing pulse, it only composits horizontal and vertical sync.
1 :
Insert equalizing pulse
Reserved.
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5-7
Extended Indexed Register CREG A6 : Reserved
This is a read/write register.
Default value after hardware reset is Hex 00.
Port address is Hex 3D5.
D0-7 Reserved
Extended Indexed Register CREG A7:Reserved
This is a read/write register.
Port address is Hex 3D5.
Default value after hardware reset is Hex 00.
D0-7 Reserved
Extended Indexed Register CREG A8 : X Offset Control Register
This is a read/write register.
Port address is Hex 3D5.
Default value after hardware reset is Hex 00.
D0-4 LCD panel gray modulation X offset bit 0 to 4
D5-6 TFT LCD panel amplitude modulation bit 0 to 1
D7
Reserved
Bit 0-4
TP6508 has a special function to eliminate stippling wave . You can program
X-directional offset values for best looking.
User can use the amplitude modulation to smooth and get to colorfully by these two bits.
Bit 6
Bit 5
Description
0
0
Disable amplitude modulation
0
1
Select two bits and Ground signal modulation (data bit 1 to 0)
1
0
Select three bits modulation (data bit 2 to 0)
1
1
Select three bits modulation (data bit 3 to 1)
Reserved
Bit 5-6
Bit 7