參數(shù)資料
型號: ST72X734
廠商: 意法半導(dǎo)體
元件分類: ADC
英文描述: 8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C
中文描述: 8位USB單片機(jī)的顯示器,高達(dá)60K章檢察官辦公室,每1000內(nèi)存,模數(shù)轉(zhuǎn)換器,定時(shí)器,同步,材質(zhì)單元,脈寬調(diào)制/的BRM,的H / W DDC的
文件頁數(shù): 21/144頁
文件大?。?/td> 1280K
代理商: ST72X734
ST72774/ST727754/ST72734
117/144
PWM/BRM Outputs (Cont’d)
PWM/BRM Outputs
The PWM/BRM outputs are assigned to dedicated
pins.
The RC filter time must be higher than TCPUx64.
Figure 70. Typical PWM Output Filter
Table 27. 6-Bit PWM Ripple After Filtering
With RC filter (R=1K
),
fCPU = 8 MHz
VDD = 5V
PWM Duty Cycle 50%
R=Rext.
Figure 71. PWM Simplified Voltage Output After Filtering
Cext
OUTPUT
VOLTAGE
STAGE
OUTPUT
Rext
Cext (F)
V RIPPLE (mV)
0.128
78
1.28
7.8
12.8
0.78
V
DD
0V
DD
V
Vripple (mV)
V
OUTAVG
"CHARGE"
"DISCHARGE"
"CHARGE"
"DISCHARGE"
0V
V
0V
OUTAVG
V
(mV)
ripple
V
VR01956
"CHARGE"
"DISCHARGE"
"CHARGE"
"DISCHARGE"
PWMOUT
DD
PWMOUT
OUTPUT
VOLTAGE
OUTPUT
VOLTAGE
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