PIC18F4550-I/PT Microchip Technology Inc., PIC18F4550-I/PT Datasheet - Page 159

• Manufacturer Part Number: PIC18F4550-I/PT
• Description: 44 PIN, 32 KB FLASH, 2048 RAM, FS-USB 2.0
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4550-I/PT

• A/d Inputs: 13-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 34
• Interface: I2C/SPI/UART/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

FIGURE 16-8:
FIGURE 16-9:
© 2006 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.
Shoot-Through Current
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
External Switch C
External Switch D
2: t
3: t
SIGNAL
of 4 T
are inactive at this time.
ON
OFF
is the turn-on delay of power switch QC and its driver.
OSC
is the turn-off delay of power switch QD and its driver.
Potential
PWM DIRECTION CHANGE
PWM DIRECTION CHANGE AT NEAR 100% DUTY CYCLE
, 16 T
P1A
P1B
P1C
P1D
(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
PIC18F2455/2550/4455/4550
Period
DC
Preliminary
(1)
t1
DC
(Note 2)
t
ON
Reverse Period
t
t = t
(2)
OFF
Period
(3)
OFF
DC
– t
ON
(2, 3)
DS39632C-page 157