PIC16F874-20/L Microchip Technology, PIC16F874-20/L Datasheet - Page 127

• Manufacturer Part Number: PIC16F874-20/L
• Description: IC MCU FLASH 4KX14 EE 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F874-20/L

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 192 B
• Interface Type: MSSP, PSP, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163022, DV164120
• Minimum Operating Temperature: 0 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164309 - MODULE SKT FOR PM3 44PLCC444-1001 - DEMO BOARD FOR PICMICRO MCUDVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Lead Free Status / Rohs Status: Details

8.2
8.2.1
1997 Microchip Technology Inc.
INTCON Register
Control Registers
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Generally devices have a minimum of three registers associated with interrupts. The INTCON
register which contains Global Interrupt Enable bit, GIE, as well as the Peripheral Interrupt
Enable bit, PEIE, and the PIE / PIR register pair which enable the peripheral interrupts and dis-
play the interrupt flag status.
The INTCON Register is a readable and writable register which contains various enable and flag
bits.
Register 8-1: INTCON Register
bit 7
GIE: Global Interrupt Enable bit
1 = Enables all un-masked interrupts
0 = Disables all interrupts
PEIE: Peripheral Interrupt Enable bit
1 = Enables all un-masked peripheral interrupts
0 = Disables all peripheral interrupts
T0IE: TMR0 Overflow Interrupt Enable bit
1 = Enables the TMR0 overflow interrupt
0 = Disables the TMR0 overflow interrupt
INTE: INT External Interrupt Enable bit
1 = Enables the INT external interrupt
0 = Disables the INT external interrupt
RBIE
1 = Enables the RB port change interrupt
0 = Disables the RB port change interrupt
T0IF: TMR0 Overflow Interrupt Flag bit
1 = TMR0 register has overflowed (must be cleared in software)
0 = TMR0 register did not overflow
INTF: INT External Interrupt Flag bit
1 = The INT external interrupt occurred (must be cleared in software)
0 = The INT external interrupt did not occur
RBIF
1 = At least one of the RB7:RB4 pins changed state (must be cleared in software)
0 = None of the RB7:RB4 pins have changed state
Legend
R = Readable bit
U = Unimplemented bit, read as ‘0’
R/W-0
Note 1: In some devices, the RBIE bit may also be known as GPIE and the RBIF bit may be
Note 2: Some devices may not have this feature. For those devices this bit is reserved.
Note 3: In devices with only one peripheral interrupt, this bit may be EEIE or ADIE.
Note:
GIE
(1)
(1)
: RB Port Change Interrupt Flag bit
: RB Port Change Interrupt Enable bit
know as GPIF.
Interrupt flag bits get set when an interrupt condition occurs regardless of the state
of its corresponding enable bit or the global enable bit, GIE (INTCON<7>).This
feature allows for software polling.
PEIE
R/W-0
(3)
W = Writable bit
R/W-0
T0IE
INTE
R/W-0
Section 8. Interrupts
(2)
- n = Value at POR reset
RBIE
R/W-0
2)
(1,
R/W-0
T0IF
INTF
R/W-0
DS31008A-page 8-5
(2)
bit 0
RBIF
R/W-0
(1, 2)
8