Filter register 5, Filter register 6, Teletext register 0 – Cirrus Logic CS4955 User Manual
Page 49: Teletext register 1
CS4954 CS4955
DS278F6
49
F
ilter Register 5
Address
0
×
27
B_AMP
Read/Write
Default Value = 80h
F
ilter Register 6
Address
0
×
28
Bright_Offsett Read/Write
Default Value = 00h
Teletext Register 0
Address
0
×
29
TTXHS
Read/Write
Default Value = A1h
T
eletext Register 1
Address
0
×
2A
TTXHD
Read/Write
Default Value = 02h
Bit Number
7
6
5
4
3
2
1
0
Bit Name
B_AMP
Default
1
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7:0
B_AMP
Blue amplitude coefficient
Bit Number
7
6
5
4
3
2
1
0
Bit Name
BRIGHTNESS_OFFSET
Default
0
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7:0
BRGHT_OFFSET
Brightness adjustment ( range: -128 to +127)
Bit Number
7
6
5
4
3
2
1
0
Bit Name
TTXHS
Default
1
0
1
0
0
0
0
1
Bit
Mnemonic
Function
7:0
TTXHS
Start of teletext request pulses or start of window
Bit Number
7
6
5
4
3
2
1
0
Bit Name
TTXHD
Default
0
0
0
0
0
0
1
0
Bit
Mnemonic
Function
7:0
TTXHD
If TTX_WINDOW = 0 then this register is used as the Pipeline delay between
TTXRQ and TTXDAT signals in the teletext source. User programmable delay step
of 37 ns per LSB.
If TTX_WINDOW = 1 then this register is used as the 8 LSBs of the teletext insertion
windows; the 3 MSBs are located in register 0×31. (register 0×31 bit 3)