PIC16C745 Datasheet

IC型号：
PIC16C745
PDF描述：
8-Bit CMOS Microcontrollers with USB
文件大小：
4945.69KB
PDF页数：
165页
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PIC16C745/765

4.2.2.5

PIR1 REGISTER

Note:

This register contains the individual flag bits for the

peripheral interrupts.

Interrupt flag bits are set when an interrupt

condition occurs, regardless of the state of

its corresponding enable bit or the global

enable bit, GIE (INTCON<7>). User soft-

ware should ensure the appropriate inter-

rupt flag bits are clear prior to enabling an

interrupt.

R/W-0

PSPIF

(1)

bit7

R/W-0

ADIF

R-0

RCIF

R-0

TXIF

R/W-0

USBIF

R/W-0

CCP1IF

R/W-0

TMR2IF

R/W-0

TMR1IF

bit0

R = Readable bit

W = Writable bit

U = Unimplemented bit,

read as 鈥?鈥?/div>

-n = Value at POR reset

bit 7:

PSPIF

(1)

Parallel Slave Port Read/Write Interrupt Flag bit

= A read or a write operation has taken place (must be cleared in software)

= No read or write has occurred

ADIF:

A/D Converter Interrupt Flag bit

= An A/D conversion completed (must be cleared in software)

= The A/D conversion is not complete

RCIF:

USART Receive Interrupt Flag bit

= The USART receive buffer is full (clear by reading RCREG)

= The USART receive buffer is empty

TXIF:

USART Transmit Interrupt Flag bit

= The USART transmit buffer is empty (clear by writing to TXREG)

= The USART transmit buffer is full

USBIF:

Universal Serial Bus (USB) Interrupt Flag

= A USB interrupt condition has occurred. The specific cause can be found by examining the contents

of the UIR and UIE registers.

= No USB interrupt conditions that are enabled have occurred.

CCP1IF:

CCP1 Interrupt Flag bit

Capture Mode

= A TMR1 register capture occurred (must be cleared in software)

= No TMR1 register capture occurred

Compare Mode

= A TMR1 register compare match occurred (must be cleared in software)

= No TMR1 register compare match occurred

PWM Mode

Unused in this mode

TMR2IF:

TMR2 to PR2 Match Interrupt Flag bit

= TMR2 to PR2 match occurred (must be cleared in software)

= No TMR2 to PR2 match occurred

TMR1IF:

TMR1 Overflow Interrupt Flag bit

= TMR1 register overflowed (must be cleared in software)

= TMR1 register did not overflow

bit 6:

bit 5:

bit 4:

bit 3:

bit 2:

bit 1:

bit 0:

Note 1:

PIC16C745 device does not have a parallel slave port implemented. This bit location is reserved on this

device. Always maintain this bit clear.

DS41124A-page 26

Advanced Information

漏

1999 Microchip Technology Inc.

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