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PIC18F258-E/SOSQTP bảng dữ liệu(PDF) 141 Page - Microchip Technology

tên linh kiện PIC18F258-E/SOSQTP
Giải thích chi tiết về linh kiện  28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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PIC18F258-E/SOSQTP bảng dữ liệu(HTML) 141 Page - Microchip Technology

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© 2006 Microchip Technology Inc.
DS41159E-page 139
PIC18FXX8
FIGURE 16-7:
PWM DIRECTION CHANGE
FIGURE 16-8:
PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE
DC
Period(1)
SIGNAL
Note
1:
The direction bit in the ECCP1 Control Register (ECCP1CON.EPWM1M1) is written any time during the PWM
cycle.
2: The P1A and P1C signals switch at intervals of TOSC, 4 TOSC or 16 TOSC, depending on the Timer2 prescaler
value earlier when changing direction. The modulated P1B and P1D signals are inactive at this time.
Period
(2)
P1A (Active-High)
P1B (Active-High)
P1C (Active-High)
P1D (Active-High)
Forward Period
Reverse Period
(PWM)
P1A(1)
(PWM)
ton
(2)
toff
(3)
t = toff – ton
(2,3)
P1B(1)
P1C(1)
P1D(1)
External Switch D(1)
Potential
Shoot-Through
Current(1)
Note
1: All signals are shown as active-high.
2: ton is the turn-on delay of power switch and driver.
3: toff is the turn-off delay of power switch and driver.
External Switch C(1)
t1



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