Microcontroller IC Integrated Circuit Parts 8-Bit 20MHz 3.5KB (2K X 14) FLASH 18-SOIC

Microcontroller IC 8-Bit 20MHz 3.5KB (2K x 14) FLASH 18-SOIC PIC16F628A-I/SO

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GENERAL DESCRIPTION

The PIC16F627A/628A/648A are 18-pin Flash-based

members of the versatile PIC16F627A/628A/648A

family of low-cost, high-performance, CMOS, fullystatic,

8-bit microcontrollers.

All PICandreg; microcontrollers employ an advanced RISC

architecture. The PIC16F627A/628A/648A have

enhanced core features, an eight-level deep stack, and

multiple internal and external interrupt sources. The

separate instruction and data buses of the Harvard

architecture allow a 14-bit wide instruction word with

the separate 8-bit wide data. The two-stage instruction

pipeline allows all instructions to execute in a singlecycle,

except for program branches (which require two

cycles). A total of 35 instructions (reduced instruction

set) are available, complemented by a large register

set.

PIC16F627A/628A/648A microcontrollers typically

achieve a 2:1 code compression and a 4:1 speed

improvement over other 8-bit microcontrollers in their

class.

PIC16F627A/628A/648A devices have integrated

features to reduce external components, thus reducing

system cost, enhancing system reliability and reducing

power consumption.

The PIC16F627A/628A/648A has 8 oscillator

configurations. The single-pin RC oscillator provides a

low-cost solution. The LP oscillator minimizes power

consumption, XT is a standard crystal, and INTOSC is

a self-contained precision two-speed internal oscillator.

The HS mode is for High-Speed crystals. The EC mode

is for an external clock source.

The Sleep (Power-down) mode offers power savings.

Users can wake-up the chip from Sleep through several

external interrupts, internal interrupts and Resets.

A highly reliable Watchdog Timer with its own on-chip

RC oscillator provides protection against software lockup.

Table 1-1 shows the features of the PIC16F627A/628A/

648A mid-range microcontroller family.

A simplified block diagram of the PIC16F627A/628A/

648A is shown in Figure 3-1.

The PIC16F627A/628A/648A series fits in applications

ranging from battery chargers to low power remote

sensors. The Flash technology makes customizing

application programs (detection levels, pulse generation,

timers, etc.) extremely fast and convenient. The

small footprint packages makes this microcontroller

series ideal for all applications with space limitations.

Low cost, low power, high performance, ease of use

and I/O flexibility make the PIC16F627A/628A/648A

very versatile.

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High-Performance RISC CPU:

andbull; Operating speeds from DC andndash; 20 MHz

andbull; Interrupt capability

andbull; 8-level deep hardware stack

andbull; Direct, Indirect and Relative Addressing modes

andbull; 35 single-word instructions:

- All instructions single cycle except branches

Special Microcontroller Features:

andbull; Internal and external oscillator options:

- Precision internal 4 MHz oscillator factory

calibrated to andplusmn;1%

- Low-power internal 48 kHz oscillator

- External Oscillator support for crystals and

resonators

andbull; Power-saving Sleep mode

andbull; Programmable weak pull-ups on PORTB

andbull; Multiplexed Master Clear/Input-pin

andbull; Watchdog Timer with independent oscillator for

reliable operation

andbull; Low-voltage programming

andbull; In-Circuit Serial Programmingandtrade; (via two pins)

andbull; Programmable code protection

andbull; Brown-out Reset

andbull; Power-on Reset

andbull; Power-up Timer and Oscillator Start-up Timer

andbull; Wide operating voltage range (2.0-5.5V)

andbull; Industrial and extended temperature range

andbull; High-Endurance Flash/EEPROM cell:

- 100,000 write Flash endurance

- 1,000,000 write EEPROM endurance

- 40 year data retention

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Low-Power Features:

andbull; Standby Current:

- 100 nA @ 2.0V, typical

andbull; Operating Current:

- 12andmu;A @ 32 kHz, 2.0V, typical

- 120andmu;A @ 1 MHz, 2.0V, typical

andbull; Watchdog Timer Current:

- 1andmu;A @ 2.0V, typical

andbull; Timer1 Oscillator Current:

- 1.2andmu;A @ 32 kHz, 2.0V, typical

andbull; Dual-speed Internal Oscillator:

- Run-time selectable between 4 MHz and

48 kHz

- 4andmu;s wake-up from Sleep, 3.0V, typical

Peripheral Features:

andbull; 16 I/O pins with individual direction control

andbull; High current sink/source for direct LED drive

andbull; Analog comparator module with:

- Two analog comparators

- Programmable on-chip voltage reference

(VREF) module

- Selectable internal or external reference

- Comparator outputs are externally accessible

andbull; Timer0: 8-bit timer/counter with 8-bit

programmable prescaler

andbull; Timer1: 16-bit timer/counter with external crystal/

clock capability

andbull; Timer2: 8-bit timer/counter with 8-bit period

register, prescaler and postscaler

andbull; Capture, Compare, PWM module:

- 16-bit Capture/Compare

- 10-bit PWM

andbull; Addressable Universal Synchronous/Asynchronous

Receiver/Transmitter USART/SCI

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Specification :

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