PIC18F4431-I/PT Microchip Technology, PIC18F4431-I/PT Datasheet - Page 182

• Manufacturer Part Number: PIC18F4431-I/PT
• Description: IC PIC MCU FLASH 8KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4431-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 16KB (8K x 16)
• Package / Case: 44-TQFP, 44-VQFP
• 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
• 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 ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: EUSART/I2C/SPI/SSP
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 9-ch x 10-bit
• Package: 44TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F2331/2431/4331/4431
18.4.2
When the PWM time base is in the Single-Shot mode
(PTMOD<1:0> = 01), an interrupt event is generated
when a match with the PTPER register occurs. The
PWM Time Base register (PTMR) is reset to zero on
the following input clock edge and the PTEN bit is
cleared. The postscaler selection bits have no effect in
this Timer mode.
FIGURE 18-6:
DS39616D-page 182
PTMR_INT_REQ
PTMR_INT_REQ
Note 1: Interrupt flag bit, PTIF, is sampled here (every Q1).
A: PRESCALER = 1:1
B: PRESCALER = 1:4
2: PWM Time Base Period register, PTPER, is loaded with the value, FFFh, for this example.
PTIF bit
PTIF bit
F
PTMR
PTMR
OSC
INTERRUPTS IN SINGLE-SHOT
MODE
/4
Q1
Qc
1
1
Q2
Qc
PWM TIME BASE INTERRUPT TIMING, SINGLE-SHOT MODE
FFEh
FFEh
Q3
Qc
Q4
Qc
Q1
1
Qc
1
2
2
Q2
Qc
FFFh
FFFh
Q3
Qc
Q4
Qc
Qc
Q1
1
1
Q4
Qc
Q2
Q4
18.4.3
In
(PTMOD<1:0> = 10), an interrupt event is generated
each time the value of the PTMR register becomes
zero and the PWM time base begins to count upwards.
The postscaler selection bits may be used in this mode
of the timer to reduce the frequency of the interrupt
events.
Up/Down Count mode.
000h
000h
Q3
Qc
the
Figure 18-7
Q4
Qc
INTERRUPTS IN CONTINUOUS
UP/DOWN COUNT MODE
Continuous
Q1
Qc
Q2
Qc
shows the interrupts in Continuous
000h
000h
Q3
Qc
 2010 Microchip Technology Inc.
Up/Down
Q4
Qc
Q1
Qc
Q2
Qc
Count
000h
000h
Q3
Qc
Q4
Qc
mode