PIC18F4420T-I/PT Microchip Technology, PIC18F4420T-I/PT Datasheet - Page 157

• Manufacturer Part Number: PIC18F4420T-I/PT
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4420T-I/PT

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE 16-8:
FIGURE 16-9:
© 2008 Microchip Technology Inc.
Note 1: The direction bit in the CCP1 Control register (CCP1CON<7>) is written any time during the PWM cycle.
Note 1: All signals are shown as active-high.
External Switch C
External Switch D
P1A (Active-High)
P1B (Active-High)
P1C (Active-High)
P1D (Active-High)
2: When changing directions, the P1A and P1C signals switch before the end of the current PWM cycle at intervals
SIGNAL
Shoot-Through
of 4 T
are inactive at this time.
2: t
3: t
Current
OSC
ON
OFF
Potential
P1C
P1D
P1A
P1B
is the turn-on delay of power switch, QC, and its driver.
PWM DIRECTION CHANGE
, 16 T
PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE
is the turn-off delay of power switch, QD, and its driver.
(1)
(1)
(1)
(1)
(1)
(1)
(1)
OSC
or 64 T
DC
OSC
, depending on the Timer2 prescaler value. The modulated P1B and P1D signals
Forward Period
PIC18F2420/2520/4420/4520
Period
DC
(1)
t1
DC
(Note 2)
t
ON
Reverse Period
t
t = t
(2)
OFF
(3)
OFF
Period
DC
– t
ON
(2,3)
DS39631E-page 155