參數(shù)資料
型號(hào): PCE84C882
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: Microcontroller for monitor OSD and auto-sync applications(監(jiān)視器屏幕顯示和自動(dòng)同步應(yīng)用的微控制器)
中文描述: 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, PLASTIC, SDIP-42
文件頁(yè)數(shù): 14/60頁(yè)
文件大?。?/td> 409K
代理商: PCE84C882
1996 Jan 08
14
Philips Semiconductors
Preliminary specification
Microcontroller for monitor OSD
and auto-sync applications
PCE84C882
Fig.10 Fine adjustment output (OUT2).
handbook, full pagewidth
MLC755
tsub0
tsub16
tsub32
tsub48
tsub64
tsub80
tsub96
tsub112
tsub127
tr
111 1110
111 1011
111 1010
PWM8L
7.3
A typical PWM output application
A typical PWM application is shown in Fig.11. The buffer is
used to reduce jitter on the OSD. R1 and C1 form the
integration network the time constant of which should be at
least 5 times greater than the repetition period of the PWM
output pattern. In order to smooth a changing PWM output
a high value of C1 should be chosen. The value of C1 will
normally be in the range 1 to 10
μ
F. The potential divider
chain formed by R2 and R3 is used only when the output
voltage is to be offset. The output voltages for this
application are calculated using Equations (1) and (2).
supply voltage
×
R3
=
(1)
(2)
The loop from the PWM pin through R1 and C1 to V
SS
will
radiate high frequency energy pulses. In order to limit the
effect of this unwanted radiation source, the loop should
be kept short and a high value of R1 selected. The value
of R1 will normally be in the range 3.3 to 100 k
. It is good
practice to avoid sharing V
SS
(pin 30) with the return leads
of other sensitive signals.
V
max
R3
R1
R2
R2
×
+
R1
+
V
min
R1
R3
R3
×
+
R1
supply voltage
×
R2
R3
R3
×
+
R1
+
=
Fig.11 Typical PWM output circuit.
handbook, halfpage
MGC711
C1
R3
R1
R2
PCE84C882
PWMn
VSS
supply
voltage
analog
output
相關(guān)PDF資料
PDF描述
PCF1171C 4-digit LCD car clock(4數(shù)字LCD汽車時(shí)鐘)
PCF1171CT 4-digit LCD car clock
PCF1171CU 4-digit LCD car clock
PCF1172C 3 1 /2 -digit LCD car clock(3 1 /2 數(shù)字 LCD汽車時(shí)鐘)
PCF1172CT 31/2-digit LCD car clock
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCE84C886 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Microcontroller for monitor OSD and auto-sync applications
PCEA02 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:.100&.156 RECEPTACLE WITH BOARD HOOKS
PCE-A-05 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:.100 RECEPTACLE WITH BOARD HOOKS
PCEA10 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:.100&.156 RECEPTACLE WITH BOARD HOOKS
PCEA20 制造商:ADAM-TECH 制造商全稱:Adam Technologies, Inc. 功能描述:.100&.156 RECEPTACLE WITH BOARD HOOKS