PIC16F636-I/P Microchip Technology Inc., PIC16F636-I/P Datasheet - Page 26

• Manufacturer Part Number: PIC16F636-I/P
• Description: 14 PIN, 3.5 KB FLASH, 128 RAM, 12 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F636-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 12
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 14-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Speed: 20 MHz
• Timers: 1-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC12F635/PIC16F636/639
2.2.2.5
The PIR1 register contains the interrupt flag bits, as
shown in Register 2-5.
REGISTER 2-5:
DS41232B-page 24
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
PIR1 Register
PIR1 – PERIPHERAL INTERRUPT REQUEST REGISTER 1 (ADDRESS: 0Ch)
bit 7
EEIF: EEPROM Write Operation Interrupt Flag bit
1 = The write operation completed (must be cleared in software)
0 = The write operation has not completed or has not been started
LVDIF: Low-Voltage Detect Interrupt Flag bit
1 = The supply voltage has crossed selected LVD voltage (must be cleared in software)
0 = The supply voltage has not crossed selected LVD voltage
CRIF: Cryptographic Interrupt Flag bit
1 = The Cryptographic module has completed an operation (must be cleared in software)
0 = The Cryptographic module has not completed an operation or is Idle
C2IF: Comparator 2 Interrupt Flag bit
1 = Comparator output (C2OUT bit) has changed (must be cleared in software)
0 = Comparator output (C2OUT bit) has not changed
C1IF: Comparator 1 Interrupt Flag bit
1 = Comparator output (C1OUT bit) has changed (must be cleared in software)
0 = Comparator output (C1OUT bit) has not changed
OSFIF: Oscillator Fail Interrupt Flag bit
1 = System oscillator failed, clock input has changed INTOSC (must be cleared in software)
0 = System clock operating
Unimplemented: Read as ‘0’
TMR1IF: Timer1 Interrupt Flag bit
1 = Timer1 rolled over (must be cleared in software)
0 = Timer1 has not rolled over
Legend:
R = Readable bit
- n = Value at POR
R/W-0
Note 1: PIC16F636/639 only.
EEIF
R/W-0
LVDIF
R/W-0
CRIF
Preliminary
W = Writable bit
‘1’ = Bit is set
(1)
C2IF
R/W-0
Note:
(1)
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
C1IF
Interrupt flag bits are set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit or the Global
Interrupt Enable bit, GIE (INTCON<7>).
User
appropriate interrupt flag bits are clear
prior to enabling an interrupt.
software
OSFIF
R/W-0
© 2005 Microchip Technology Inc.
should
x = Bit is unknown
U-0
—
ensure
TMR1IF
R/W-0
bit 0
the