STV0118 datasheet(31/42 Pages) STMICROELECTRONICS

31 / 42 page

VI.2 - Register Contents and Description (continued)

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

VI - REGISTERS (continued)

REGISTER_3 - Configuration3

MSB

LSB

Content

entrap

trap_pal

encgms

nosd

del2

del1

del0

xxx

Default

000

entrap

Enable trap filter

(*)

Trap filter disabled

Trap filter enabled

trap_pal Refer to Functional Description, Section IV.9

Note : ‘trap_pal’ is taken into account only if bit ‘entrap’ is set.

(*)

To select the NTSC trap filter (centered around 3.58MHz) (see Figure 16)

To select the PAL trap filter (centered around 4.43MHz) (see Figure 17)

encgms CGMS encoding enable (Refer to Functional Description, Section IV.14)

(*)

Disabled

Enabled

Note :

When encgms is set to 1 Closed-Captions/Extended Data Services should not be programmed on lines 20 and

283 (525/60, SMPTE line number convention).

nosd

Choice of active edge of ‘ckref’ (master clock) that samples incoming YCrCb data (Refer to

Functional Description, Section IV.17).

(*)

‘ckref’ rising edge (e.g. data with OSD coming from STi3520M)

‘ckref’ falling edge (e.g. data without OSD coming from STi3520M)

Note :

Typically, this bit is used when two STV0118’s are used in a ‘dual encoding’ configuration.

del[2:0]

Delay on luma path with reference to chroma path

(Refer to Functional Description, Section IV.9)

(*)

del2

del1

del0

Delay on luma path with reference to chroma path

(one pixel corresponds to 1/13.5MHz (74.04ns))

+ 2 pixel delay on luma

+ 1 pixel delay on luma

+ 0 pixel delay on luma

- 1 pixel delay on luma

- 2 pixel delay on luma

Other

+ 0 pixel delay on luma

STV0118

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