PCA84C846 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

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

t sub

t sub

t sub

CASE 1

VSTH VSTL

VSTH,VSTL is loaded into VSTREG

t sub

t sub

CASE 2

t sub

VSTH

VSTL

VSTH,VSTL is loaded into VSTREG

t sub

t sub

CASE 3

VSTL

VSTH,VSTL is loaded VSTH

into VSTREG

In CASE 1 and CASE 2, a new value for VSTH, VSTL is latched into VSTREG.

In CASE 3, VSTL, together with an old value of VSTH are latched into VSTREG.

Fig.7 Latching VSTH, VSTL into VSTREG.

t sub

MED180

handbook, full pagewidth

3/fxtal

f xtal

3

127

0

1

2

tsubn

m

m+1 m+2

127

0

1

00

(1)

01

(1)

m

(1)

127

decimal value VSTH data latch

MGC573

(1) ts = -(---V----S-----T----Hf--x---t-+a---l-1----)----×-----3---

Fig.8 TDAC output (not inverted) with coarse adjustment only; VSTL = 1111111; P14LVL = 0.

1995 Jun 15

12

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