PCA84C846 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

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

Internal data bus

‘MOVE instruction’

MSB

DAC INTERFACE

7-BIT DATA LATCH

(VSTH)

LSB

DAC INTERFACE

7-BIT DATA LATCH

(VSTL)

‘MOV instruction’

DATA LOAD

TIMING PULSE

PWM output polarity

control bit

7

7

LOAD

(1)

14-BIT DATA LATCH

(VSTREG)

7

7

COARSE 7-BIT

PWM

OUT1

FINE

ADDITIONAL

PULSE

GENERATOR

OUT2

ADD

Q

Q

P14LVL

Q14 to 8

14-BIT COUNTER

Q7 to 1

MED179

TDAC output

f TDAC = fxtal

3

(1) See Fig.7 for timing.

Fig.6 Block diagram of the 14-bit PWM DAC.

1995 Jun 15

11

Share Link: