PIC18C658-E/PT Microchip Technology, PIC18C658-E/PT Datasheet - Page 187

• Manufacturer Part Number: PIC18C658-E/PT
• Description: IC MCU OTP 16KX16 CAN 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Cr

Specifications of PIC18C658-E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 52
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: OTP
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: PIC18C658E/PT

EXAMPLE 17-1: WIN AND ICODE BITS USAGE IN INTERRUPT SERVICE ROUTINE TO ACCESS
WakeupInterrupt
NoInterrupt
ErrorInterrupt
TXB2Interrupt
TXB1Interrupt
TXB0Interrupt
RXB1Interrupt
2000 Microchip Technology Inc.
; Save application required context.
; Poll interrupt flags and determine source of interrupt
; This was found to be CAN interrupt
; TempCANCON and TempCANSTAT are variables defined in Access Bank low
movff
movff
movf
andlw
addwf
bra
bra
bra
bra
bra
bra
bra
bcf
;
; User code to handle wake-up procedure
;
;
; Continue checking for other interrupt source or return from here
…
…
bcf
…
retfie
bcf
goto
bcf
goto
bcf
goto
bcf
goto
CANCON, TempCANCON
CANSTAT, TempCANSTAT
TempCANSTAT, W
b’00001110’
PCL, F
NoInterrupt
ErrorInterrupt
TXB2Interrupt
TXB1Interrupt
TXB0Interrupt
RXB1Interrupt
RXB0Interrupt
PIR3, WAKIF
PIR3, ERRIF
PIR3, TXB2IF
AccessBuffer
PIR3, TXB1IF
AccessBuffer
PIR3, TXB0IF
AccessBuffer
PIR3, RXB1IF
Accessbuffer
TX/RX BUFFERS
Advanced Information
; Save CANCON.WIN bits
; This is required to prevent CANCON
; from corrupting CAN buffer access
; in-progress while this interrupt
; occurred
; Save CANSTAT register
; This is required to make sure that
; we use same CANSTAT value rather
; than one changed by another CAN
; interrupt.
; Retrieve ICODE bits
; Perform computed GOTO
; to corresponding interrupt cause
; 000 = No interrupt
; 001 = Error interrupt
; 010 = TXB2 interrupt
; 011 = TXB1 interrupt
; 100 = TXB0 interrupt
; 101 = RXB1 interrupt
; 110 = RXB0 interrupt
; 111 = Wake-up on interrupt
; Clear the interrupt flag
; PC should never vector here. User may
; place a trap such as infinite loop or pin/port
; indication to catch this error.
; Clear the interrupt flag
; Handle error.
; Clear the interrupt flag
; Clear the interrupt flag
; Clear the interrupt flag
; Clear the interrupt flag
PIC18CXX8
DS30475A-page 187