PIC18LF2431-I/SO Microchip Technology, PIC18LF2431-I/SO Datasheet - Page 187

• Manufacturer Part Number: PIC18LF2431-I/SO
• Description: IC MCU FLASH 8KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2431-I/SO

• Core Size: 8-Bit
• Program Memory Size: 16KB (8K 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: 24
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC18
• No. Of I/o's: 24
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 768Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Processor Series: PIC18LF
• 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: 1 x 8
• 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, DM183021, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

FIGURE 17-4:
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
© 2007 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
Preliminary
PTMOD1
PTMOD0
Timer Reset
Up/Down
Interrupt
PTMR Clock
Control
Control
These
PTMOD1:PTMOD0 bits in the PTCON0 register. The
Free-Running mode produces edge-aligned PWM
generation. The Continuous Up/Down Count modes
produce
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
four
center-aligned
PTDIR
PTEN
PTMR Clock
modes
PTIF
are
PWM
Duty Cycle Load
selected
DS39616C-page 185
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