PCA84C846 Просмотр технического описания (PDF) - Philips Electronics

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PCA84C846

Microcontrollers for TV tuning control and OSD applications

Philips Electronics 

Philips Semiconductors

Microcontrollers for TV tuning

control and OSD applications

Preliminary specification

PCA84C646; PCA84C846

handbook, full pagewidth

t sub0

t sub16

t sub32

t sub48

tr

t sub64

t sub80

t sub96

t sub112

t sub127

111 1110

111 1101

111 1011

111 1010

VSTL

Fig.9 Fine adjustment output (OUT2).

MCD314

handbook, full pagewidth

3/fxtal

f xtal

3

127

0

1

2

00

01

m

127

decimal value VSTH data latch

tsub16

m

m+1 m+2

127

0

1

MGC572

VSTL = 111 1010; Additional pulses in subperiods 16, 48, 64, 80 and 112.

Fig.10 Example of TDAC (not inverted) output pulses for several values of VSTH (tsub16).

1995 Jun 15

13

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