PIC18F2431-I/MM Microchip Technology, PIC18F2431-I/MM Datasheet - Page 188
![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: 188 of 392
- Download datasheet (4Mb)
PIC18F2331/2431/4331/4431
18.6.2
The
double-buffered to allow glitchless updates of the PWM
outputs. For each duty cycle block, there is a Duty
Cycle Buffer register that is accessible by the user and
a second Duty Cycle register that holds the actual
compare value used in the present PWM period.
In Edge-Aligned PWM Output mode, a new duty cycle
value will be updated whenever a PTMR match with the
PTPER register occurs and PTMR is reset as shown in
Figure
are automatically loaded into the Duty Cycle registers
when the PWM time base is disabled (PTEN = 0).
When the PWM time base is in the Continuous
Up/Down Count mode, new duty cycle values will be
updated when the value of the PTMR register is zero
and the PWM time base begins to count upwards. The
contents of the duty cycle buffers are automatically
loaded into the Duty Cycle registers when the PWM
time base is disabled (PTEN = 0).
the timings when the duty cycle update occurs for the
Continuous Up/Down Count mode. In this mode, up to
one entire PWM period is available for calculating and
loading the new PWM duty cycle before changes take
effect.
When the PWM time base is in the Continuous
Up/Down Count mode with double updates, new duty
cycle values will be updated when the value of the
PTMR register is zero and when the value of the PTMR
register matches the value in the PTPER register. The
contents of the duty cycle buffers are automatically
loaded into the Duty Cycle registers during both of the
previously described conditions.
the duty cycle updates for Continuous Up/Down Count
mode with double updates. In this mode, only up to half
of a PWM period is available for calculating and loading
the new PWM duty cycle before changes take effect.
FIGURE 18-13:
DS39616D-page 188
18-12. Also, the contents of the duty cycle buffers
four
DUTY CYCLE REGISTER BUFFERS
PWM
PWM Output
PTMR Value
DUTY CYCLE UPDATE TIMES IN CONTINUOUS UP/DOWN COUNT MODE
Duty
Cycle
Figure 18-14
Figure 18-13
registers
Duty Cycle Value Loaded from Buffer Register
shows
shows
are
18.6.3
Edge-aligned PWM signals are produced by the
module when the PWM time base is in the
Free-Running mode or the Single-Shot mode. For
edge-aligned PWM outputs, the output for a given
PWM channel has a period specified by the value
loaded in PTPER and a duty cycle specified by the
appropriate Duty Cycle register (see
The PWM output is driven active at the beginning of the
period (PTMR = 0) and is driven inactive when the
value in the Duty Cycle register matches PTMR. A new
cycle is started when PTMR matches the PTPER as
explained in the PWM period section.
If the value in a particular Duty Cycle register is zero,
then the output on the corresponding PWM pin will be
inactive for the entire PWM period. In addition, the out-
put on the PWM pin will be active for the entire PWM
period if the value in the Duty Cycle register is greater
than the value held in the PTPER register.
FIGURE 18-12:
PTPER
Active at
Beginning
of Period
PDCx
PDCx
(new)
New Value Written to Duty Cycle Buffer
(old)
0
PTMR
Value
EDGE-ALIGNED PWM
Duty Cycle
Period
EDGE-ALIGNED PWM
2010 Microchip Technology Inc.
New Duty Cycle Latched
Figure
18-12).
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