Teletext register 6, Teletext register 7, Teletext register 8 – Cirrus Logic CS4955 User Manual
Page 51
CS4954 CS4955
DS278F6
51
Teletext Register 6
Address
0
×
2F
TTX_DIS1
Read/Write
Default Value = 00h
T
eletext Register 7
Address
0
×
30
TTX_DIS2
Read/Write
Default Value = 00h
T
eletext Register 8
Address
0
×
31
TTX_DIS3
Read/Write
Default Value = 00h
Bit Number
7
6
5
4
3
2
1
0
Bit Name
TTX_LINE_DIS1
Default
0
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7:0
TTX_LINE_DIS1
Teletext disable bits corresponding to the lines 5-12 respectively, (11111111=all
eight lines are disabled),
(MSB is for line 5, LSB is for line 12)
Bit Number
7
6
5
4
3
2
1
0
Bit Name
TTX_LINE_DIS2
Default
0
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7:0
TTX_LINE_DIS2
Teletext disable bits corresponding to the lines 13-20 respectively, (11111111=all
eight lines are disabled,
(MSB is for line 13, LSB is for line 20)
Bit Number
7
6
5
4
3
2
1
0
Bit Name
TTXHD
RESERVED TTX_WINDOW
TTX_LINE_DIS3
Default
0
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7:5
TTXHD
If TTX_WINDOW = 0 these 3 bits are unused.
If TTX_WINDOW = 1 these 3 bits are the MSBs of the register 0×2A; they are used
to specify the length of the teletext insertion window
4
Reserved
3
TTX_WINDOW
Selects between TTXRQ (= 0) pulsation or TTXRQ (= 1) Window mode
2:0
TTX_LINE_DIS3
Teletext disable bits corresponding to the lines 13-20 respectively, (111=all three
lines are disabled),
(MSB is for line 21, LSB is for line 23)