PIC16F1939-I/PT【PDF 9/92 页】IC MCU 8BIT FLASH 44TQFP

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PIC18F2480/2580/4480/4580

DS39637D-page 126

2009 Microchip Technology Inc.

REGISTER 10-6:

PIR3: PERIPHERAL INTERRUPT REQUEST (FLAG) REGISTER 3

Mode 0

R/W-0

IRXIF

WAKIF

ERRIF

TXB2IF

TXB1IF(1)

TXB0IF(1)

RXB1IF

RXB0IF

Mode 1,2

R/W-0

IRXIF

WAKIF

ERRIF

TXBnIF

TXB1IF(1)

TXB0IF(1)

RXBnIF

FIFOWMIF(1)

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

IRXIF: CAN Invalid Received Message Interrupt Flag bit

1 = An invalid message has occurred on the CAN bus

0 = No invalid message on CAN bus

bit 6

WAKIF: CAN bus Activity Wake-up Interrupt Flag bit

1 = Activity on CAN bus has occurred

0 = No activity on CAN bus

bit 5

ERRIF: CAN bus Error Interrupt Flag bit

1 = An error has occurred in the CAN module (multiple sources)

0 = No CAN module errors

bit 4

When CAN is in Mode 0:

TXB2IF: CAN Transmit Buffer 2 Interrupt Flag bit

1 = Transmit Buffer 2 has completed transmission of a message and may be reloaded

0 = Transmit Buffer 2 has not completed transmission of a message

When CAN is in Mode 1 or 2:

TXBnIF: Any Transmit Buffer Interrupt Flag bit

1 = One or more transmit buffers have completed transmission of a message and may be reloaded

0 = No transmit buffer is ready for reload

bit 3

TXB1IF: CAN Transmit Buffer 1 Interrupt Flag bit(1)

1 = Transmit Buffer 1 has completed transmission of a message and may be reloaded

0 = Transmit Buffer 1 has not completed transmission of a message

bit 2

TXB0IF: CAN Transmit Buffer 0 Interrupt Flag bit(1)

1 = Transmit Buffer 0 has completed transmission of a message and may be reloaded

0 = Transmit Buffer 0 has not completed transmission of a message

bit 1

When CAN is in Mode 0:

RXB1IF: CAN Receive Buffer 1 Interrupt Flag bit

1 = Receive Buffer 1 has received a new message

0 = Receive Buffer 1 has not received a new message

When CAN is in Mode 1 or 2:

RXBnIF: Any Receive Buffer Interrupt Flag bit

1 = One or more receive buffers has received a new message

0 = No receive buffer has received a new message

bit 0

When CAN is in Mode 0:

RXB0IF: CAN Receive Buffer 0 Interrupt Flag bit

1 = Receive Buffer 0 has received a new message

0 = Receive Buffer 0 has not received a new message

When CAN is in Mode 1:

Unimplemented: Read as ‘0’

When CAN is in Mode 2:

FIFOWMIF: FIFO Watermark Interrupt Flag bit(1)

1 = FIFO high watermark is reached

0 = FIFO high watermark is not reached

Note 1:

In CAN Mode 1 and 2, these bits are forced to ‘0’.

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