STW8019 datasheet(23/55 Pages) STMICROELECTRONICS

23 / 55 page

STw8009/STw8019

Control registers

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Resetting the oscillator means forcing the value of the phase accumulator to its nominal

value to avoid accumulating errors due to the finite number of bits used internally. The value

at which the accumulator is reset is either the hard-wired default phase value or the value

loaded in Reg. 13-14 (according to bit ‘selrst’) at which a 00, 900, 1800, or 2700 correction is

applied according to the field and line at which the reset is performed.

main_entrap: enable trap filter

(*) 0 = trap filter disabled

1 = trap filter enabled

trap_4.43: trap filter centered frequency value selection

(*) 0 = trap filter centered around 3.58 MHz

1 = trap filter centered around 4.43 MHz

Note:

‘trap_4.43’ is taken into account only if bit ‘main_entrap’ is set.

main_del_en: Enable chroma to luma delay programming on cvbs output:

(*) 0 = disabled (DENC automatically set this delay)

1 = enabled (chroma to luma delay is programmed by del(3:0) bits from register 81.

Note:

This delay affects only the cvbs output. The component outputs Y/C remain unaffected.

Refer to register 109 to program chroma to luma delay on Y/C output.

val_422_ck_mux: should be programmed to “0” only.

Table 6.

valrst1 and valrst0 selection

valrst1

valrst0

selection

(*)

Automatic reset of the oscillator every line

Automatic reset of the oscillator every 2nd field

Automatic reset of the oscillator every 4th field

Automatic reset of the oscillator every 8th field

configuration3

Address: 0x0003

Type: R/W

content

main_

entrap

trap_4.43

main_del_

val_422_

ck_ mux

xxx

default

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