PIC16C84_13 datasheet(3/110 Pages) MICROCHIP

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PIC16C84

 1996-2013 Microchip Technology Inc.

DS30445D-page 3

1.0

GENERAL DESCRIPTION

The PIC16C84 is a low-cost, high-performance,

CMOS, fully-static, 8-bit microcontroller.

All PIC16/17 microcontrollers employ an advanced

RISC architecture. PIC16CXX devices have enhanced

core features, eight-level deep stack, and multiple inter-

nal and external interrupt sources. The separate

instruction and data buses of the Harvard architecture

allow a 14-bit wide instruction word with a separate

8-bit wide data bus. The two stage instruction pipeline

allows all instructions to execute in a single cycle,

except for program branches (which require two

cycles). A total of 35 instructions (reduced instruction

set) are available. Additionally, a large register set is

used to achieve a very high performance level.

PIC16CXX microcontrollers typically achieve a 2:1

code compression and up to a 2:1 speed improvement

(at 10 MHz) over other 8-bit microcontrollers in their

class.

The PIC16C84 has 36 bytes of RAM, 64 bytes of Data

EEPROM memory, and 13 I/O pins. A timer/counter is

also available.

The PIC16CXX family has special features to reduce

external components, thus reducing cost, enhancing

system reliability and reducing power consumption.

There are four oscillator options, of which the single pin

RC oscillator provides a low-cost solution, the LP

oscillator minimizes power consumption, XT is a

standard crystal, and the HS is for High Speed crystals.

The SLEEP (power-down) mode offers power savings.

The user can wake the chip from sleep through several

external and internal interrupts and resets.

A highly reliable Watchdog Timer with its own on-chip

RC oscillator provides protection against software lock-

up.

The PIC16C84 EEPROM program memory allows the

same device package to be used for prototyping and

production. In-circuit reprogrammability allows the

code to be updated without the device being removed

from the end application. This is useful in the

development of many applications where the device

may not be easily accessible, but the prototypes may

require code updates. This is also useful for remote

applications where the code may need to be updated

(such as rate information).

Table 1-1 lists the features of the PIC16C84. A simpli-

fied block diagram of the PIC16C84 is shown in

Figure 3-1.

The PIC16C84 fits perfectly in applications ranging

from high speed automotive and appliance motor

control to low-power remote sensors, electronic locks,

security devices and smart cards. The EEPROM

technology

makes

customization

application

programs (transmitter codes, motor speeds, receiver

frequencies, security codes, etc.) extremely fast and

convenient. The small footprint packages make this

microcontroller series perfect for all applications with

space

limitations.

Low

cost,

low

power,

high

performance, ease of use and I/O flexibility make the

PIC16C84 very versatile even in areas where no

microcontroller use has been considered before

(e.g., timer functions, serial communication, capture

and compare, PWM functions and co-processor

applications).

The serial in-system programming feature (via two

pins) offers flexibility of customizing the product after

complete assembly and testing. This feature can be

used to serialize a product, store calibration data, or

program the device with the current firmware before

shipping.

1.1

Family and Upward Compatibility

Those users familiar with the PIC16C5X family of

microcontrollers will realize that this is an enhanced

version of the PIC16C5X architecture. Please refer to

Appendix A for a detailed list of enhancements. Code

written for PIC16C5X can be easily ported to the

PIC16C84 (Appendix B).

1.2

Development Support

The PIC16CXX family is supported by a full-featured

macro assembler, a software simulator, an in-circuit

emulator, a low-cost development programmer and a

full-featured programmer. A “C” compiler and fuzzy

logic support tools are also available.

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