PCA84C646P PHILIPS [NXP Semiconductors], PCA84C646P Datasheet - Page 11
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PCA84C646P
Manufacturer Part Number
PCA84C646P
Description
Microcontrollers for TV tuning control and OSD applications
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
1.PCA84C646P.pdf
(72 pages)
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Philips Semiconductors
1995 Jun 15
Microcontrollers for TV tuning
control and OSD applications
(1) See Fig.7 for timing.
PWM output polarity
control bit
TIMING PULSE
‘MOVE instruction’
DATA LOAD
P14LVL
Fig.6 Block diagram of the 14-bit PWM DAC.
7-BIT DATA LATCH
DAC INTERFACE
(VSTH)
LOAD
COARSE 7-BIT
Q14 to 8
(1)
Internal data bus
PWM
MSB
7
7
OUT1
14-BIT DATA LATCH
14-BIT COUNTER
Q
11
(VSTREG)
ADD
7-BIT DATA LATCH
OUT2
DAC INTERFACE
Q
GENERATOR
ADDITIONAL
PULSE
(VSTL)
FINE
Q7 to 1
7
7
MED179
PCA84C646; PCA84C846
LSB
‘MOV instruction’
TDAC output
f
TDAC
= f
xtal
Preliminary specification
3
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