PIC16C745SLASHP datasheet(5/158 Pages) MICROCHIP

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Advanced Information

DS41124A-page 5

PIC16C745/765

1.0

GENERAL DESCRIPTION

The PIC16C745/765 devices are low-cost, high-perfor-

mance, CMOS, fully-static, 8-bit microcontrollers in the

PIC16CXX mid-range family.

All PICmicro® microcontrollers employ an advanced

RISC architecture. The PIC16CXX microcontroller fam-

ily has enhanced core features, 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 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 gives

some of the architectural innovations used to achieve a

very high performance.

The PIC16C745 device has 22 I/O pins. The

PIC16C765 device has 33 I/O pins. Each device has

256 bytes of RAM. In addition, several peripheral fea-

tures are available including: three timer/counters, two

Capture/Compare/PWM modules and two serial ports.

The Universal Serial Bus (USB 1.1) peripheral pro-

vides bus communications. The Universal Synchro-

nous Asynchronous Receiver Transmitter (USART) is

also known as the Serial Communications Interface or

SCI. Also, a 5-channel high-speed 8-bit A/D is pro-

vided on the PIC16C745, while the PIC16C765 offers

8 channels. The 8-bit resolution is ideally suited for

applications requiring a low-cost analog interface,

(e.g., thermostat control, pressure sensing, etc).

The PIC16C745/765 devices have special features to

reduce external components, thus reducing cost,

enhancing system reliability and reducing power con-

sumption. There are 4 oscillator options, of which EC is

for the external regulated clock source, E4 is for the

external regulated clock source with PLL, HS is for the

high speed crystals/resonators and H4 is for high

speed crystals/resontators with PLL. The SLEEP

(power-down) feature provides a power-saving mode.

The user can wake up the chip from SLEEP through

several external and internal interrupts and resets.

A highly reliable Watchdog Timer (WDT), with a dedi-

cated on-chip RC oscillator, provides protection against

software lock-up, and also provides one way of waking

the device from SLEEP.

A UV erasable CERDIP packaged version is ideal for

code development, while the cost-effective One-Time-

Programmable (OTP) version is suitable for production

in any volume.

The PIC16C745/765 devices fit nicely in many applica-

tions ranging from security and remote sensors to appli-

ance

controls

and

automotives.

The

EPROM

technology makes customization of application pro-

grams (data loggers, industrial controls, UPS) extremely

fast and convenient. The small footprint packages make

this microcontroller series perfect for all applications

with space limitations. Low cost, low power, high perfor-

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

PIC16C745/765 devices very versatile, even in areas

where no microcontroller use has been considered

before (e.g., timer functions, serial communication, cap-

ture and compare, PWM functions and coprocessor

applications).

1.1

Family and Upward Compatibility

Users familiar with the PIC16C5X microcontroller fam-

ily will realize that this is an enhanced version of the

PIC16C5X

architecture.

Code

written

for

the

PIC16C5X can be easily ported to the PIC16CXX fam-

ily of devices.

1.2

Development Support

PICmicro® devices are supported by the complete line

of Microchip Development tools.

Please refer to Section 15.0 for more details about

Microchip’s development tools.

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