PIC16F84A-04I/P Microchip Technology Inc., PIC16F84A-04I/P Datasheet - Page 5

• Manufacturer Part Number: PIC16F84A-04I/P
• Description: 18 PIN, 1.75 KB FLASH, 68 RAM, 13 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F84A-04I/P

• Cpu Speed: 5 MIPS
• Eeprom Memory: 64 Bytes
• Input Output: 13
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin PDIP
• Programmable Memory: 1.75K Bytes
• Ram Size: 68 Bytes
• Speed: 20 MHz
• Timers: 1-8-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

1.0
This document contains device specific information for
the operation of the PIC16F84A device. Additional
information may be found in the PICmicro™ Mid-
Range Reference Manual, (DS33023), which may be
downloaded from the Microchip website. The Refer-
ence Manual should be considered a complementary
document to this data sheet, and is highly recom-
mended reading for a better understanding of the
device architecture and operation of the peripheral
modules.
The PIC16F84A belongs to the mid-range family of the
PICmicro
the device is shown in Figure 1-1.
FIGURE 1-1:
2001 Microchip Technology Inc.
Program
Instruction Register
OSC2/CLKOUT
Bus
OSC1/CLKIN
DEVICE OVERVIEW
®
Generation
Instruction
Decode &
Program
1K x 14
microcontroller devices. A block diagram of
Memory
Control
FLASH
Timing
14
PIC16F84A BLOCK DIAGRAM
13
MCLR
5
Start-up Timer
Program Counter
Power-on
Watchdog
Power-up
Oscillator
8 Level Stack
Reset
Timer
Timer
(13-bit)
Direct Addr
V
DD
8
, V
SS
File Registers
Addr Mux
W reg
ALU
Data Bus
68 x 8
RAM
7
STATUS reg
FSR reg
The program memory contains 1K words, which trans-
lates to 1024 instructions, since each 14-bit program
memory word is the same width as each device instruc-
tion. The data memory (RAM) contains 68 bytes. Data
EEPROM is 64 bytes.
There are also 13 I/O pins that are user-configured on
a pin-to-pin basis. Some pins are multiplexed with other
device functions. These functions include:
• External interrupt
• Change on PORTB interrupt
• Timer0 clock input
Table 1-1 details the pinout of the device with descrip-
tions and details for each pin.
MUX
7
RAM Addr
Indirect
Addr
8
8
EEPROM Data Memory
EEDATA
I/O Ports
TMR0
PIC16F84A
DS35007B-page 3
Data Memory
EEPROM
EEADR
RA4/T0CKI
64 x 8
RB7:RB1
RA3:RA0
RB0/INT