PIC16F627A_05 Datasheet, PDF (7/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
1.0 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, fully-
static, 8-bit microcontrollers.
All PICmicro^® 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 single-
cycle, 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 lock-
up.
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 genera-
tion, 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.
1.1 Development Support
The PIC16F627A/628A/648A family is supported by a
full-featured macro assembler, a software simulator, an
in-circuit emulator, a low cost in-circuit debugger, a low
cost development programmer and a full-featured
programmer. A Third Party “C” compiler support tool is
also available.
TABLE 1-1: PIC16F627A/628A/648A FAMILY OF DEVICES
Clock
Memory
Maximum Frequency
of Operation (MHz)
Flash Program
Memory (words)
RAM Data Memory
(bytes)
PIC16F627A
20
1024
224
PIC16F628A
20
2048
224
PIC16F648A
20
PIC16LF627A
20
PIC16LF628A
20
PIC16LF648A
20
4096
1024
2048
4096
256
224
224
256
EEPROM Data
Memory (bytes)
128
128
256
128
128
256
Timer module(s)
Comparator(s)
Peripherals Capture/Compare/
PWM modules
Serial Communications
Internal Voltage
Reference
Interrupt Sources
TMR0, TMR1,
TMR2
2
1
USART
Yes
10
TMR0, TMR1,
TMR2
2
1
USART
Yes
10
TMR0, TMR1,
TMR2
2
1
USART
Yes
10
TMR0, TMR1,
TMR2
2
1
USART
Yes
10
TMR0, TMR1,
TMR2
2
1
USART
Yes
10
TMR0, TMR1,
TMR2
2
1
USART
Yes
10
Features
I/O Pins
Voltage Range (Volts)
16
3.0-5.5
16
3.0-5.5
16
3.0-5.5
16
2.0-5.5
16
2.0-5.5
16
2.0-5.5
Brown-out Reset
Yes
Yes
Yes
Yes
Yes
Yes
Packages
18-pin DIP,
SOIC, 20-pin
SSOP,
28-pin QFN
18-pin DIP,
SOIC, 20-pin
SSOP,
28-pin QFN
18-pin DIP,
SOIC, 20-pin
SSOP,
28-pin QFN
18-pin DIP,
SOIC, 20-pin
SSOP,
28-pin QFN
18-pin DIP,
SOIC, 20-pin
SSOP,
28-pin QFN
18-pin DIP,
SOIC, 20-pin
SSOP,
28-pin QFN
All PICmicro^® family devices have Power-on Reset, selectable Watchdog Timer, selectable code-protect and high I/O current capability.
All PIC16F627A/628A/648A family devices use serial programming with clock pin RB6 and data pin RB7.
© 2005 Microchip Technology Inc.
DS40044D-page 5