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PDF PCA84C646 Data sheet ( Hoja de datos )
| Número de pieza | PCA84C646 | |
| Descripción | Microcontrollers for TV tuning control and OSD applications | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
PCA84C646; PCA84C846
Microcontrollers for TV tuning
control and OSD applications
Preliminary specification
Supersedes data of June 1994
File under Integrated Circuits, IC14
1995 Jun 15
1 page  
Philips Semiconductors
Microcontrollers for TV tuning
control and OSD applications
4 BLOCK DIAGRAM
Preliminary specification
PCA84C646; PCA84C846
1995 Jun 15
5
5 Page 
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
77
LOAD
(1)
14-BIT DATA LATCH
(VSTREG)
77
COARSE 7-BIT
PWM
OUT1
FINE
ADDITIONAL
PULSE
GENERATOR
OUT2
ADD
QQ
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
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet PCA84C646.PDF ] | |
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