STV0118 datasheet(39/42 Pages) STMICROELECTRONICS

39 / 42 page

VI.2 - Register Contents and Description (continued)

(*) = DEFAULT mode when NRESET pin is active (LOW level)

VI - REGISTERS (continued)

REGISTER_39-40 - cccf1 : Closed caption characters/extended data for field 1

First byte to encode in field1 :

MSB

LSB

register_39

opc11

c117

c116

c115

c114

c113

c112

c111

opc11

Odd-parity bit of US-ASCII 7-bit character c11[7:1]

Second byte to encode in field1:

MSB

LSB

register_40

opc12

c127

c126

c125

c124

c123

c122

c121

opc12

Odd-parity bit of US-ASCII 7-bit character c12[7:1]

Default value : none, but closed captions enabling without loading these registers will

issue character NULL. Registers 39-40 are never reset.

REGISTER_41-42 : cccf2 : Closed caption characters/extended data for field 2

First byte to encode in filed2 :

MSB

LSB

register_41

opc21

c217

c216

c215

c214

c213

c212

c211

opc21

Odd-parity bit of US-ASCII 7-bit character c21[7:1]

Second byte to encode in field2 :

MSB

LSB

register_42

opc22

c227

c226

c225

c224

c223

c222

c221

opc22

Odd-parity bit of US-ASCII 7-bit character c22[7:1]

Default value : none but closed captions enabling without loading these registers will

issue character NULL. Registers 41-42 are never reset.

REGISTER_43 - cclif1 : Closed caption/extended data line insertion for field 1

TV line number where closed caption/extended data is to be encoded in field 1 is programmable through

the following register :

MSB

LSB

register_43

xxxx

l1_4

l1_3

l1_2

l1_1

l1_0

Default

00001

- 525/60 system : (525-SMPTE line number convention)

Only lines 10 through 22 should be used for closed caption or extended data services (line 1 through 9

contain the vertical sync pulses with equalizing pulses).

l1[4:0] = 00000 no line selected for closed caption encoding

l1[4:0] = 000xx do not use these codes

...

l1[4:0] = i code line (i+6) (SMPTE) selected for encoding

...

l1[4:0] = 11111 line 37 (SMPTE) selected

- 625/50 system: (625-CCIR/ITU-R line number convention)

Only lines 7 through 23 should be used for closed caption or extended data services.

l1[4:0] = 00000 no line selected for closed caption encoding

...

l1[4:0] = i code line (i+6) (CCIR) selected for encoding (i > 0)

...

l1[4:0] = 11111 line 37 (CCIR) selected

(*) Default value = 01111 line 21 (525/60, 525-SMPTE line number convention).

This value also corresponds to line 21 in 625/50 system,(625-CCIR line number convention).

STV0118

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