TW2866C datasheet(66/143 Pages) RENESAS

66 / 143 page

TW2866C

FN8253 Rev. 0.00

Page 66 of 143

February 3, 2012

0XA4(CH1)/0XA5(CH2)/0XA6(CH3)/0XA7(CH4) – ID DETECTION CONTROL

Bit

Function R/W

Description

Reset

7-6

IDX

R/W

These two bits indicate which of the four lower 6-bit registers

is currently being controlled. The write sequence is a two steps

process unless the same register is written. A write of

{ID,000000} selects one of the four registers to be written. A

subsequent write will actually write into the register.

5-0

NSEN /

SSEN /

PSEN /

WKTH

R/W

IDX = 0 controls the NTSC color carrier detection sensitivity

(NSEN).

IDX = 1 controls the SECAM ID detection sensitivity (SSEN).

IDX = 2 controls the PAL ID detection sensitivity (PSEN).

IDX = 3 controls the weak signal detection sensitivity (WKTH).

1A /

20 /

1C /

0XC4(CH1)/0XC5(CH2)/0XC6(CH3)/0XC7(CH4) – H MONITOR

Bit

Function R/W

Description

Reset

7-0

HFREF

Horizontal line frequency indicator(Test purpose only)

0X80 – SOFTWARE RESET CONTROL REGISTER

Bit

Function

R/W

Description

Reset

7-6

Reserved

00b

AUDIORST

An 1 written to this bit resets the Audio portion to its default

state but all register content remain unchanged. This bit is self-

resetting.

VOUTRST

An 1 written to this bit resets Video data mux output logic to its