PIC16F631-I/P Microchip Technology Inc., PIC16F631-I/P Datasheet - Page 64

• Manufacturer Part Number: PIC16F631-I/P
• Description: MCU, 8-Bit, 1KW Flash, 64 RAM, 18 I/O, PDIP-20
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F631-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 18
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 20-pin PDIP
• Programmable Memory: 1.75K Bytes
• Ram Size: 64 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

PIC16F631/677/685/687/689/690
REGISTER 4-5:
REGISTER 4-6:
DS41262D-page 62
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-6
bit 5-4
bit 3
bit 2-0
Note 1:
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-6
bit 5-0
Note 1:
U-0
U-0
—
—
2:
3:
4:
2:
Global RABPU bit of the OPTION register must be enabled for individual pull-ups to be enabled.
The weak pull-up device is automatically disabled if the pin is in Output mode (TRISA = 0).
The RA3 pull-up is enabled when configured as MCLR and disabled as an I/O in the Configuration Word.
WPUA<5:4> always reads ‘1’ in XT, HS and LP Oscillator modes.
Global Interrupt Enable (GIE) must be enabled for individual interrupts to be recognized.
IOCA<5:4> always reads ‘1’ in XT, HS and LP Oscillator modes.
Unimplemented: Read as ‘0’
WPUA<5:4>: Weak Pull-up Register bit
1 = Pull-up enabled
0 = Pull-up disabled
Unimplemented: Read as ‘0’
WPUA<2:0>: Weak Pull-up Register bit
1 = Pull-up enabled
0 = Pull-up disabled
Unimplemented: Read as ‘0’
IOCA<5:0>: Interrupt-on-change PORTA Control bit
1 = Interrupt-on-change enabled
0 = Interrupt-on-change disabled
U-0
U-0
—
—
WPUA: PORTA REGISTER
IOCA: INTERRUPT-ON-CHANGE PORTA REGISTER
W = Writable bit
‘1’ = Bit is set
W = Writable bit
‘1’ = Bit is set
WPUA5
IOCA5
R/W-1
R/W-0
WPUA4
IOCA4
R/W-1
R/W-0
U = Unimplemented bit, read as ‘0’
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
‘0’ = Bit is cleared
IOCA3
R/W-0
U-0
—
WPUA2
IOCA2
R/W-1
R/W-0
© 2007 Microchip Technology Inc.
x = Bit is unknown
x = Bit is unknown
WPUA1
IOCA1
R/W-1
R/W-0
WPUA0
IOCA0
R/W-1
R/W-0
bit 0
bit 0