Toshiba 21V53 - Option Bytes - Teletext; Teletext Options (TX1)

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TX1: Teletext Options
b7: 1, Auto APS after Stand-By
0, no APS after Stand-By
In shipping condition, APS bit is set to1 and after the TV is turned on for the first time,
it’s automatically set to 0.
b6: RESERVED (must be 0)
b5: 1, Frequency item is VISIBLE in Install Menu and APS Menu
0, Frequency item is INVISIBLE in Install Menu and APS Menu
b4-3: Chassis Code
00, EP version
01, EE version
10, EN version
11, EJ version
Chassis Code is used when no country is selected in A.P.S menu, so the software
automatically selects the sound standard depending on the chassis code.
b2-1-0: Device type selection
000, EPROM M6 A
001, ROM H5 P
010, ROMLESS H5 P
011, EPROM M6 R
100, ROM M6 R
101, OSDEPROM M6 R OTP
110, ROM M6 P MASK P SERIES
111, Read Auto Gain Table for the device from EEPROM MASK O SERIES
The default values of the option bytes are given in the following table:
EN Version EP Version EE Version
OP1
0111 0101 0111 0101 0111 0101
OP2
0000 1001 0100 1001 0001 1001
OP3
0110 0111 1110 0111 1110 0111
OP4
0000 1001 (AV20&21BJ8)
0010 1001 (AV14BJ&BM8)
0000 1001 (AV20&21BJ8)
0010 1001 (AV14BJ&BM8)
0000 1001 (AV20&21BJ8)
0010 1001 (AV14BJ&BM8)
OP5
1000 0000 1000 0000 1000 0000
TX1
(1)001 0(101) (1)000 0(101) (1)000 1(101)