PIC18F4431-E/ML Microchip Technology, PIC18F4431-E/ML Datasheet - Page 177

• Manufacturer Part Number: PIC18F4431-E/ML
• Description: IC MCU FLASH 8KX16 44QFN
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4431-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, Power Control PWM, QEI, 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 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE 18-4:
The PWM time base can be configured for four different
modes of operation:
• Free-Running mode
• Single-Shot mode
• Continuous Up/Down Count mode
• Continuous Up/Down Count mode with interrupts
 2010 Microchip Technology Inc.
for double updates
F
OSC
/4
Comparator
PWM TIME BASE BLOCK DIAGRAM
PTPER Buffer
PTPER
1:1, 1:4, 1:16, 1:64
Zero Match
Period Match
Prescaler
PTMR Register
Comparator
Update Disable (UDIS)
Period Load
PIC18F2331/2431/4331/4431
Period Match
Zero Match
Postscaler
1:1-1:16
Zero Match
Period Match
PTMOD1
PTMOD1
PTMOD0
PTMOD1
PTMOD0
Timer Reset
Up/Down
Interrupt
PTMR Clock
Control
Control
These four modes are selected by the PTMOD<1:0>
bits in the PTCON0 register. The Free-Running mode
produces
Continuous
center-aligned PWM generation. The Single-Shot
mode allows the PWM module to support pulse control
of certain Electronically Commutated Motors (ECMs)
and produces edge-aligned operation.
Direction
Clock
Control
Timer
edge-aligned
PTDIR
PTEN
PTMR Clock
Up/Down
PTIF
Count
PWM
Duty Cycle Load
DS39616D-page 177
modes
generation.
produce
The