PIC18F458-I/PTG Microchip Technology, PIC18F458-I/PTG Datasheet - Page 240
PIC18F458-I/PTG
Manufacturer Part Number
PIC18F458-I/PTG
Description
IC MCU FLASH 16KX16 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18LF242-ISO.pdf
(36 pages)
3.PIC18F248-ISO.pdf
(402 pages)
4.PIC18F248-ISO.pdf
(8 pages)
Specifications of PIC18F458-I/PTG
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
33
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC18LF242-ISO PDF datasheet #2
- PIC18F248-ISO PDF datasheet #3
- PIC18F248-ISO PDF datasheet #4
- Current page: 240 of 402
- Download datasheet (7Mb)
FIGURE 19-10:
19.13 CAN Interrupts
The module has several sources of interrupts. Each of
these interrupts can be individually enabled or
disabled. The CANINTF register contains interrupt
flags. The CANINTE register contains the enables for
the 8 main interrupts. A special set of read-only bits in
the CANSTAT register, the ICODE bits, can be used in
combination with a jump table for efficient handling of
interrupts.
All interrupts have one source, with the exception of the
error interrupt. Any of the error interrupt sources can set
the error interrupt flag. The source of the error interrupt
can be determined by reading the Communication
Status register, COMSTAT.
The interrupts can be broken up into two categories:
receive and transmit interrupts.
The receive related interrupts are:
• Receive Interrupts
• Wake-up Interrupt
• Receiver Overrun Interrupt
• Receiver Warning Interrupt
• Receiver Error-Passive Interrupt
The transmit related interrupts are:
• Transmit Interrupts
• Transmitter Warning Interrupt
• Transmitter Error-Passive Interrupt
• Bus-Off Interrupt
DS41159E-page 238
PIC18FXX8
RXERRCNT < 127 or
TXERRCNT < 127
ERROR MODES STATE DIAGRAM
Passive
Error-
TXERRCNT > 255
RXERRCNT > 127 or
TXERRCNT > 127
Active
Error-
19.13.1
The source of a pending interrupt is indicated in the
ICODE (Interrupt Code) bits of the CANSTAT register
(ICODE<2:0>). Interrupts are internally prioritized such
that the higher priority interrupts are assigned lower
ICODE values. Once the highest priority interrupt con-
dition has been cleared, the code for the next highest
priority interrupt that is pending (if any) will be reflected
by the ICODE bits (see Table 19-3, following page).
Note that only those interrupt sources that have their
associated CANINTE enable bit set will be reflected in
the ICODE bits.
19.13.2
When the transmit interrupt is enabled, an interrupt will
be generated when the associated transmit buffer
becomes empty and is ready to be loaded with a new
message. The TXBnIF bit will be set to indicate the
source of the interrupt. The interrupt is cleared by the
MCU resetting the TXBnIF bit to a ‘0’.
19.13.3
When the receive interrupt is enabled, an interrupt will
be generated when a message has been successfully
received and loaded into the associated receive buffer.
This interrupt is activated immediately after receiving
the EOF field. The RXBnIF bit will be set to indicate the
source of the interrupt. The interrupt is cleared by the
MCU resetting the RXBnIF bit to a ‘0’.
Bus-
Off
INTERRUPT CODE BITS
TRANSMIT INTERRUPT
RECEIVE INTERRUPT
Reset
128 occurrences of
11 consecutive
“recessive” bits
© 2006 Microchip Technology Inc.
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