VI.2 - Register Contents and Description (continued)

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

VI - REGISTERS (continued)

REGISTER_44 - cclif2 : Closed caption/extended data line insertion for field 2

TV line number where closed caption/extended data is to be encoded in field 2 is programmable through

the following register :

MSB

LSB

register_44

xxxx

xxxx

xxxx

I2_4

I2_3

I2_2

I2_1

I2_0

Default

00001

1

1

1

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

Only lines 273 through 284 should be used for closed caption or extended data services (preceding lines

contain the vertical sync pulses with equalizing pulses), although it is possible to program over a wider

range.

l2[4:0] = 00000 no line selected for closed caption encoding

l2[4:0] = 000xx do not use these codes

l2[4:0] = i line (269 +i) (SMPTE) selected for encoding

...

l2[4:0] = 01111 line 284 (SMPTE) selected for encoding

l2[4:0] = 11111 line 300 (SMPTE)

Note : if cgms is allowed on lines 20 and 283 (525/60, 525-SMPTE line number convention), closed

captions should not be programmed on these lines.

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

Only lines 319 through 336 should be used for closed caption or extended data services (preceding lines

contain the vertical sync pulses with equalizing pulses), although it is possible to program over a wider

range.

l2[4:0] = 00000 no line selected for closed caption encoding (i > 0)

l2[4:0] = i line (318 +i) (CCIR) selected for encoding

...

l2[4:0] = 10010 line 336 (CCIR) selected for encoding

l2[4:0] = 11111 line 349 (CCIR)

(*) Default value = 01111 line 284 (525/60, 525-SMPTE line number convention).

This value also corresponds to line 333 in 625/50 system, (625-CCIR line number convention).

REGISTERS_45 up to 63 : Reserved

STV0118

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