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PCA84C846 Просмотр технического описания (PDF) - Philips Electronics
Номер в каталоге
Компоненты Описание
производитель
PCA84C846
Microcontrollers for TV tuning control and OSD applications
Philips Electronics
PCA84C846 Datasheet PDF : 72 Pages
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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
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