TDA9321 datasheet(14/44 Pages) PHILIPS

14 / 44 page

1998 Dec 16

Philips Semiconductors

Preliminary speciﬁcation

I2C-bus controlled TV input processor

TDA9321H

Notes

1. When bit ECMB = 1 the subcarrier frequency is present on pin 30. The YCF and CCF signals coming from the comb

filter are only switched on when a signal is received that can be combed.

2. X = don’t care.

3. AUTO YC means the decoder switches between CVBS and Y/C depending on the presence of the burst signal on

these signals.

4. AUTO COMB means the decoder switches to Y/C mode if the burst is present on the C input and to the comb filter

output if the burst is present on the CVBS signal.

Table 24 Video switch outputs

Table 25 Enable YUV input (on RGB1 input)

Table 26 External RGB clamp mode

Table 27 Enable fast blanking RGB1

Table 28 Enable fast blanking RGB2

TXT2

PIP2

TXT1

PIP1

TXT0

PIP0

OUTPUT SIGNAL TXT

OUTPUT SIGNAL PIP

−

CVBSint

CVBS1

CVBS2

CVBS3

101

Y3 + C3

CVBS4

111

Y4 + C4

YUV

MODE

RGB1 input active

YUV input active

ECL

MODE

off; internal clamp pulse used

on; external clamp pulse has to be supplied to

pin HA/CLP

IE1

FAST BLANKING

not active

active

IE2

FAST BLANKING

not active

active

Table 29 Output switches OS0 and OS1

Table 30 Fast ﬁlter IF-PLL

Table 31 IF circuit not active

Table 32 Group delay correction

Table 33 Modulation standard

Table 34 AFC window

OS0; OS1

CONDITIONS

output = LOW

output = HIGH

FFI

CONDITIONS

normal time constant

fast time constant

IFO

MODE

normal operation of IF ampliﬁer

IF ampliﬁer switched off

GROUP DELAY CHARACTERISTIC

ﬂat

according to BG standard

MOD

MODULATION

negative

positive

AFW

AFC WINDOW

normal

enlarged

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