VI.2 - Register Contents and Description (continued)

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

VI - REGISTERS (continued)

REGISTER_1 - Configuration1

MSB

LSB

Content

blkli

flt1

flt0

sync_ok

coki

setup

cc2

cc1

Default

01

000

1

0

0

blkli

Vertical BlankingInterval selectionfor active video lines area (refer to FunctionalDescription,

Section IV.2 and Figures 2 to 7).

(*)

0

(‘partial blanking’) Only following lines inside Vertical Interval are blanked

NTSC-M : lines [1..9], [263(half)..272] (525-SMPTE)

PAL-M : lines [523..6], [260(half)..269] (525-CCIR)

other PAL : lines [623(half)..5], [311..318] (625-CCIR)

This mode allows preservation of VBI data embedded within incoming YCrCb, e.g.

Teletext (lines [7..22] and [320..335]), Wide Screen signalling (full line 23), Video

Programing Service (line16), etc.).

1

(‘full blanking’) All lines inside VBI are blanked

NTSC-M : lines [1..19], [263(half)..282] (525-SMPTE)

PAL-M : lines [523..16], [260(half)..279] (525-CCIR)

other PAL : lines [623(half)..22], [311..335] (625-CCIR)

Note :

blkli must be set to ’0’ when closed captions and are to be encoded on following lines :

- in 525/60 system: before line 20(SMPTE) or before line 283(SMPTE)

- in 625/50 system: before line 23(CCIR) or before line 336(CCIR)

For CGMS and Teletext encodings, blkli value is not taken into account.

flt[1:0]

U/V Chroma filter bandwidth selection

(Refer to Functional Description, Section IV.10 and Figures 4 and 5)

(*)

flt1

0

0

1

1

flt0

0

1

0

1

3dB Bandwidth

f-3 = 1.1MHz

f-3 = 1.3MHz

f-3 = 1.6MHz

f-3 = 1.9MHz

Typical Application

Low definition NTSC filter

Low definition PAL filter

High definition NTSC filter (ATSC compliant)

& PAL M/N (ITU-R 624.4 compliant)

High definition PAL filter: Rec 624 - 4 for PALBDG/I compliant

sync_ok Availability of sync signals (analog and digital) in case of input synchronization loss with no

free-run active (i.e. freerun=0) (Refer to Functional Description, Section IV.5)

(*)

0

1

No synchro output signals

Output synchros available on YS, CVBS and, when applicable, HSYNC (if output port),

ODDEVEN (if output port), i.e same behavior as free-run except that video outputs are

blanked in the active portion of the line

Caution :

This bit is taken into account in ODDEV-only, VSYNC-only or ‘F’ based slave modes and is irrelevant to other

synchronization modes.

coki

Color killer (Refer to Functional Description, Section IV.11)

(*)

0

1

Color ON

Color suppressed on CVBS (and CVBS1) output signal (CVBS=YS) but color still present

on C andRGB outputs.For color suppressionon chromaDAC ‘C’,see register 5 bitbkg_c.

setup

Pedestal enable (Refer to Functional Description, Section IV.9)

(*)

0

1

Blanking level and black level are identical on all lines

(ex : Argentinian PAL-N, Japan NTSC-M, PAL-BDGHI)

Black level is 7.5 IRE above blanking level on all lines outside VBI

(ex :Paraguayan and Uruguayan PAL-N)

In all standards, gain factor is adjusted to obtain the required levels for chrominance.

cc2, cc1 Closed caption encoding mode (Refer to Functional Description, Section IV.13)

(*)

cc2

0

0

1

1

cc1

0

1

0

1

Encoding Mode

No closed caption/extendeddata encoding

Closed caption/extendeddata encoding enabled in field 1 (odd)

Closed caption/extendeddata encoding enabled in field 2 (even)

Closed caption/extendeddata encoding enabled in both fields

STV0118

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