PIC18F4331-E/PT Microchip Technology, PIC18F4331-E/PT Datasheet - Page 181
PIC18F4331-E/PT
Manufacturer Part Number
PIC18F4331-E/PT
Description
IC MCU FLASH 4KX16 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F818-ISO.pdf
(6 pages)
3.PIC18F2331-ISO.pdf
(392 pages)
4.PIC18F2331-ISO.pdf
(8 pages)
5.PIC18F2331-ISO.pdf
(6 pages)
6.PIC18F2331-ISO.pdf
(16 pages)
7.PIC18LF2331-ISO.pdf
(40 pages)
8.PIC18F4331-EP.pdf
(400 pages)
Specifications of PIC18F4331-E/PT
Core Size
8-Bit
Program Memory Size
8KB (4K x 16)
Core Processor
PIC
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 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-TQFP, 44-VQFP
Controller Family/series
PIC18
No. Of I/o's
36
Eeprom Memory Size
256Byte
Ram Memory Size
768Byte
Cpu Speed
40MHz
No. Of Timers
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
I3-DB18F4431 - BOARD DAUGHTER ICEPIC3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F4331-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F818-ISO PDF datasheet #2
- PIC18F2331-ISO PDF datasheet #3
- PIC18F2331-ISO PDF datasheet #4
- PIC18F2331-ISO PDF datasheet #5
- PIC18F2331-ISO PDF datasheet #6
- PIC18LF2331-ISO PDF datasheet #7
- PIC18F4331-EP PDF datasheet #8
- Current page: 181 of 392
- Download datasheet (4Mb)
Table 18-1
can be generated with the PWM time base and the
prescaler.
(F
the table. The PWM module must be capable of gener-
ating PWM signals at the line frequency (50 Hz or
60 Hz) for certain power control applications.
TABLE 18-1:
FIGURE 18-5:
2010 Microchip Technology Inc.
Prescale
Minimum PWM Frequencies vs. Prescaler Value
PTMR_INT_REQ
Note 1: PWM Time Base Period register, PTPER, is loaded with the value, FFFh, for this example.
PTMR_INT_REQ
A: PRESCALER = 1:1
B: PRESCALER = 1:4
CYC
1:16
1:64
1:1
1:4
= 10 MHz) and PTPER = 0xFFF is assumed in
for F
PTIF bit
PTIF bit
F
PTMR
PTMR
OSC
shows the minimum PWM frequencies that
An
CYC
/4
PWM Frequency
Edge-Aligned
Q1
Qc
= 10 MIPS (PTPER = 0FFFh)
operating
MINIMUM PWM FREQUENCY
2441 Hz
610 Hz
153 Hz
38 Hz
Q2
Qc
PWM TIME BASE INTERRUPT TIMING, FREE-RUNNING MODE
FFEh
FFEh
Q3
Qc
frequency
Q4
Qc
PWM Frequency
Center-Aligned
Q1
Qc
1221 Hz
305 Hz
76 Hz
19 Hz
1
1
Q2
Qc
of
FFFh
FFFh
PIC18F2331/2431/4331/4431
Q3
Qc
40 MHz
Q4
Qc
Q1
Qc
Q4
Q2
Qc
Q4
18.3.5
The match output of PTMR can optionally be
postscaled through a 4-bit postscaler (which gives a
1:1 to 1:16 scaling inclusive) to generate an interrupt.
The postscaler counter is cleared when any of the
following occurs:
• Write to the PTMR register
• Write to the PTCON register
• Any device Reset
The PTMR register is not cleared when PTCON is
written.
18.4
The PWM timer can generate interrupts based on the
modes of operation selected by the PTMOD<1:0> bits
and the postscaler bits (PTOPS<3:0>).
18.4.1
When the PWM time base is in the Free-Running mode
(PTMOD<1:0> = 00), an interrupt event is generated
each time a match with the PTPER register occurs. The
PTMR register is reset to zero in the following clock edge.
Using a postscaler selection other than 1:1 will reduce
the frequency of interrupt events.
000h
000h
Q3
Qc
Q4
Qc
PWM Time Base Interrupts
PWM TIME BASE POSTSCALER
INTERRUPTS IN FREE-RUNNING
MODE
Q1
Qc
Q2
Qc
001h
001h
Q3
Qc
Q4
Qc
Q1
Qc
DS39616D-page 181
Q2
Qc
002h
002h
Q3
Qc
Q4
Qc
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