參數(shù)資料
型號(hào)： W78CE354
廠商： WINBOND ELECTRONICS CORP
英文描述： MONITOR MICROCONTROLLER
中文描述： 顯示器單片機(jī)
文件頁(yè)數(shù)： 27/44頁(yè)
文件大?。?/td> 426K
代理商： W78CE354
W78C354
Publication Release Date: October 1996
- 27 -
Revision A1
L. PWM DACs
There are two 12-bit and fourteen 8-bit PWM static DACs and one 12-bit and three 8-bit PWM
dynamic DACs on this chip. The number of the PWM outputs is different with the package.
68-PIN PLCC
48-PIN DIP
40-PIN DIP
8-bit SDAC
14
8 + 4*
8 + 4*
12-bit SDAC
2
1
1
8-bit DDAC
3
3
1
12-bit DDAC
1
1
1
Note : 4* : the SDAC
S
share with P2.4~P2.7
L-1.1 14-channel 8-bit PWM Static DAC
The static DACs (SDAC0 to 13) are used to generate DC voltage control (0 to 5V) by an RC circuit,
as shown in Figure 8, and to execute the "MOV SDACn, #Value" instruction. There are 14 registers,
corresponding to the 14 channels of 8-bit PWM output. The unused PWM channel can be used as an
output pin, since 0 or 5V can be obtained from the pin.
Duty cycle of the PWM output = Preset value of SDACn
ò
255, where n = 0 to 13
DC voltage after low-pass filter = V
CC
×
duty cycle
SDAC0
SDAC13: 8-bit PWM static DAC registers storing preset values
PRESET VALUE
0
1
n
255
DUTY CYCLE
0/255
1/255
n/255
255/255
DC VOLTAGE
0V
1/255
×
5V
n/255
×
5V
+5V
PWM frequency F
PWM
= F
CLOCK
ò
255
Fclock
16 MHz
18.432 MHz
20 MHz
F
PWM
62.745 KHz
72.282 KHz
78.431 KHz
T
PWM
15.94
μ
S
13.83
μ
S
12.75
μ
S
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W78CE354E 制造商:WINBOND 制造商全稱:Winbond 功能描述:MONITOR MICROCONTROLLER
W78CE354P 制造商:WINBOND 制造商全稱:Winbond 功能描述:MONITOR MICROCONTROLLER
W78CSX2 制造商:Magnecraft 功能描述:3-5 Days
W78CSX-2 制造商:Magnecraft 功能描述:Relay Electromechanical 4PDT 12 VDC Plug In
W78CSX-3 制造商:MAGNECRAFT 功能描述:
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