PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 678

• Manufacturer Part Number: PIC16F877-20/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/P

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K 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: 256 x 8
• Ram Size: 368 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: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
I
DS31035A-page 35-6
I
Inter-Integrated Circuit. This is a two wire communication interface. This feature is one of the
modes of the SSP module.
Indirect Addressing
When the Data Memory Address is not contained in the Instruction. The instruction operates on
the INDF address, which causes the Data Memory Address to be the value in the FSR register.
The execution of the instruction will always access the data at the address pointed to by the FSR
register.
Instruction Bus
The bus which is used to transfer instruction words from the program memory to the CPU.
Instruction Fetch
Due to the Harvard architecture, when one instruction is to be executed, the next location in pro-
gram memory is “fetched” and ready to be decoded as soon as the currently executing instruction
is completed.
Instruction cycle
The events for an instruction to execute. There are four events which can generally be described
as: Decode, Read, Execute, and Write. Not all events will be done by all instructions. To see the
operations during the instruction cycle, please look in the description of each instruction. Four
external clocks (Tosc) make one instruction cycle (T
Interrupt
A signal to the CPU that causes the program flow to be forced to the Interrupt Vector Address
(04h in program memory). Before the program flow is changed, the contents of the Program
Counter (PC) are forced onto the hardware stack, so that program execution may return to the
interrupted point.
INTRC
Internal Resistor-Capacitor (RC). Some devices have a device oscillator option that allows the
clock to come from an internal RC.
2
C
CY
).
1997 Microchip Technology Inc.