參數(shù)資料
型號: PCA84C886
廠商: NXP Semiconductors N.V.
英文描述: Microcontrollers for TV tuning control and OSD applications(應(yīng)用于TV調(diào)頻和OSD的微控制器)
中文描述: 微控制器的控制和調(diào)整(應(yīng)用于電視調(diào)頻和OSD的微控制器應(yīng)用的電視OSD)
文件頁數(shù): 11/72頁
文件大小: 564K
代理商: PCA84C886
1995 Jun 15
11
Philips Semiconductors
Preliminary specification
Microcontrollers for TV tuning
control and OSD applications
PCA84C646; PCA84C846
Fig.6 Block diagram of the 14-bit PWM DAC.
DAC INTERFACE
7-BIT DATA LATCH
(VSTH)
DAC INTERFACE
7-BIT DATA LATCH
(VSTL)
14-BIT DATA LATCH
(VSTREG)
‘MOVE instruction’
‘MOV instruction’
DATA LOAD
TIMING PULSE
COARSE 7-BIT
PWM
FINE
ADDITIONAL
PULSE
GENERATOR
OUT2
OUT1
ADD
Q
Q
P14LVL
14-BIT COUNTER
Q14 to 8
Q7 to 1
PWM output polarity
control bit
TDAC output
fTDAC
xtal
3
MED179
7
MSB
LSB
7
7
7
LOAD
(1)
Internal data bus
(1) See Fig.7 for timing.
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