PIC18F4431-I/ML Microchip Technology, PIC18F4431-I/ML Datasheet - Page 160

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

Specifications of PIC18F4431-I/ML

• 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: 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 ~ 85°C
• Package / Case: 44-QFN
• 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
• 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: 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, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 9 bit
• Package: 44QFN EP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44QFN2 - SOCKET TRAN ICE 44QFN/40DIPAC164322 - MODULE SOCKET MPLAB PM3 28/44QFN444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / Rohs Status: Details

PIC18F2331/2431/4331/4431
The CCPR1H register and a 2-bit internal latch are
used to double buffer the PWM duty cycle. This double
buffering is essential for glitchless PWM operation.
When the CCPR1H and 2-bit latch match TMR2,
concatenated with an internal 2-bit Q clock or two bits
of the TMR2 prescaler, the CCP1 pin is cleared. The
maximum PWM resolution (bits) for a given PWM
frequency is given by the following equation:
EQUATION 15-3:
TABLE 15-3:
TABLE 15-4:
DS39616C-page 158
INTCON
PIR1
PIE1
IPR1
TRISC
TMR2
PR2
T2CON
CCPR1L
CCPR1H
CCP1CON
CCPR2L
CCPR2H
CCP2CON
Legend:
Timer Prescaler (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
Note:
Name
PWM Resolution (max) =
PWM Frequency
x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by PWM and Timer2.
PORTC Data Direction Register
Timer2 Register
Timer2 Period Register
Capture/Compare/PWM Register 1 Low Byte
Capture/Compare/PWM Register 1 High Byte
Capture/Compare/PWM Register 2 Low Byte
Capture/Compare/PWM Register 2 High Byte
If the PWM duty cycle value is longer than
the PWM period, the CCP1 pin will not be
cleared.
GIE/GIEH PEIE/GIEL
Bit 7
—
—
—
—
—
—
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz
REGISTERS ASSOCIATED WITH PWM AND TIMER2
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
ADIE
ADIP
Bit 6
ADIF
—
—
log
TMR0IE
log(2)
DC1B1
DC2B1
⎛
⎝
RCIF
RCIE
RCIP
F
Bit 5
2.44 kHz
F
PWM
OSC
FFh
16
10
⎞
⎠
bits
DC1B0
DC2B0
INT0IE
Bit 4
TXIF
TXIE
TXIP
9.77 kHz
Preliminary
FFh
10
4
CCP1M3
CCP2M3
SSPIE
SSPIP
SSPIF
RBIE
Bit 3
39.06 kHz
15.5.3
The following steps should be taken when configuring
the CCP1 module for PWM operation:
1.
2.
3.
4.
5.
CCP1M2 CCP1M1
CCP2M2 CCP2M1
TMR0IF
CCP1IF
CCP1IE
CCP1IP
FFh
Bit 2
10
1
Set the PWM period by writing to the PR2 register.
Set the PWM duty cycle by writing to the CCPR1L
register and CCP1CON<5:4> bits.
Make the CCP1 pin an output by clearing the
TRISC<2> bit.
Set the TMR2 prescale value and enable Timer2
by writing to T2CON.
Configure the CCP1 module for PWM operation.
SETUP FOR PWM OPERATION
TMR2IF
TMR2IE
TMR2IP
INT0IF
156.25 kHz
Bit 1
3Fh
1
8
CCP1M0 --00 0000 --00 0000
CCP2M0 --00 0000 --00 0000
TMR1IE -000 0000 -000 0000
TMR1IP -111 1111 -111 1111
TMR1IF
RBIF
Bit 0
© 2007 Microchip Technology Inc.
312.50 kHz
1Fh
0000 000x 0000 000u
-000 0000 -000 0000
1111 1111 1111 1111
0000 0000 0000 0000
1111 1111 1111 1111
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
POR, BOR
1
7
Value on
416.67 kHz
Value on
all other
6.58
17h
Resets
1