PIC16F876AT-I/SO Microchip Technology, PIC16F876AT-I/SO Datasheet - Page 17

• Manufacturer Part Number: PIC16F876AT-I/SO
• Description: IC MCU CMOS 20MHZ 8K FLSH 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F876AT-I/SO

• 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: 22
• 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 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC16F
• No. Of I/o's: 22
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.0
There are three memory blocks in each of the
PIC16F87XA devices. The program memory and data
memory have separate buses so that concurrent
access can occur and is detailed in this section. The
EEPROM data memory block is detailed in Section 3.0
“Data EEPROM and Flash Program Memory”.
Additional information on device memory may be found
in the PICmicro
Manual (DS33023).
FIGURE 2-1:
 2003 Microchip Technology Inc.
On-Chip
Program
Memory
CALL, RETURN
RETFIE, RETLW
MEMORY ORGANIZATION
®
Mid-Range MCU Family Reference
Interrupt Vector
PIC16F876A/877A
PROGRAM MEMORY MAP
AND STACK
Stack Level 8
Stack Level 2
Stack Level 1
Reset Vector
PC<12:0>
Page 0
Page 1
Page 2
Page 3
13
0000h
0004h
0005h
07FFh
0800h
0FFFh
1000h
17FFh
1800h
1FFFh
2.1
The PIC16F87XA devices have a 13-bit program
counter capable of addressing an 8K word x 14 bit
program memory space. The PIC16F876A/877A
devices have 8K words x 14 bits of Flash program
memory,
4K words x 14 bits. Accessing a location above the
physically
wraparound.
The Reset vector is at 0000h and the interrupt vector is
at 0004h.
FIGURE 2-2:
Program
On-Chip
Memory
CALL, RETURN
RETFIE, RETLW
Program Memory Organization
while
implemented
PIC16F873A/874A
PIC16F87XA
Interrupt Vector
PIC16F873A/874A
PROGRAM MEMORY MAP
AND STACK
Stack Level 8
Stack Level 2
Reset Vector
Stack Level 1
PC<12:0>
Page 0
Page 1
address
13
DS39582B-page 15
will
devices
0000h
0004h
0005h
07FFh
0800h
0FFFh
1000h
1FFFh
cause
have
a