PIC18F2431-I/MM Microchip Technology, PIC18F2431-I/MM Datasheet - Page 184
![16 KB Flash, 768 RAM, 22 I/O 28 QFN-S 6x6m TUBE](/photos/6/81/68120/150-28-qfn_sml.jpg)
PIC18F2431-I/MM
Manufacturer Part Number
PIC18F2431-I/MM
Description
16 KB Flash, 768 RAM, 22 I/O 28 QFN-S 6x6m TUBE
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)
Specifications of PIC18F2431-I/MM
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
24
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 5x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-QFN
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
24
Number Of Timers
4
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, DM183021, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 5 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Request inventory verification / Request inventory verification
Other names
PIC18F2431-I/ML
PIC18F2431-I/ML
PIC18F2431-I/ML
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F2431-I/MM
Manufacturer:
Microchip Technology
Quantity:
135
Part Number:
PIC18F2431-I/MM
Manufacturer:
MICROCHI
Quantity:
20 000
- 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
- Current page: 184 of 392
- Download datasheet (4Mb)
PIC18F2331/2431/4331/4431
18.4.4
This mode is available in Continuous Up/Down Count
mode. In the Double Update mode (PTMOD<1:0> = 11),
an interrupt event is generated each time the PTMR
register is equal to zero and each time the PTMR
matches with PTPER register.
interrupts in Continuous Up/Down Count mode with
double updates.
The Double Update mode provides two additional
functions to the user in Center-Aligned mode.
1.
2.
FIGURE 18-8:
DS39616D-page 184
Note 1: Interrupt flag bit, PTIF, is sampled here (every Q1).
PTMR_INT_REQ
PTMR_INT_REQ
A: PRESCALER = 1:1
The control loop bandwidth is doubled because
the PWM duty cycles can be updated twice per
period.
Asymmetrical center-aligned PWM waveforms
can be generated, which are useful for
minimizing output waveform distortion in certain
motor control applications.
PTDIR bit
PTDIR bit
2: PWM Time Base Period register, PTPER, is loaded with the value, 3FFh, for this example.
PTIF bit
PTIF bit
PTMR
PTMR
OSC1
OSC1
INTERRUPTS IN DOUBLE UPDATE
MODE
Case 1: PTMR Counting Upwards
Case 2: PTMR Counting Downwards
Q1
1
Q1
1
Q2
Q2
PWM TIME BASE INTERRUPT, CONTINUOUS UP/DOWN COUNT MODE WITH
DOUBLE UPDATES
3FDh
002h
Q3
Q3
Figure 18-8
Q4
Q4
Q1
1
Q1
1
Q2
Q2
3FEh
001h
shows the
Q3
Q3
Q4
Q4
Q1
Q1
1
1
2
Q2
Q2
3FFh
000h
Note:
Q3
Q3
Q4
Q4
Do not change the PTMOD bits while
PTEN is active; it will yield unexpected
results. To change the PWM Timer mode
of operation, first clear the PTEN bit, load
the PTMOD bits with the required data
and then set PTEN.
Q1
Q1
1
1
Q2
Q2
3FEh
001h
Q3
Q3
2010 Microchip Technology Inc.
Q4
Q4
Q1
Q1
Q2
Q2
002h
3FDh
Q3
Q3
Q4
Q4
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