PIC16F627A Datasheet, PDF (7/168 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontrollers

PIC16F627A/628A/648A
1.0 GENERAL DESCRIPTION
The PIC16F627A/628A/648A are 18-Pin FLASH-
based members of the versatile PIC16CXX 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, 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 fea-
tures to reduce external components, thus reducing
system cost, enhancing system reliability and reducing
power consumption.
The PIC16F627A/628A/648A has 8 oscillator configu-
rations. The single-pin RC oscillator provides a low cost
solution. The LP oscillator minimizes power consump-
tion, XT is a standard crystal, and INTOSC is a self-
contained precision two-speed internal oscillator. The
HS 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 sev-
eral 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 families.
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 pro-
grammer. A Third Party “C” compiler support tool is
also available.
TABLE 1-1: PIC16F627A/628A/648A FAMILY OF DEVICES
PIC16F627A PIC16F628A PIC16F648A PIC16LF627A PIC16LF628A PIC16LF648A
Clock
Maximum Frequency
20
20
20
4
4
4
of Operation (MHz)
FLASH Program Mem-
ory (words)
1024
2048
4096
1024
2048
4096
Memory RAM Data Memory
224
224
256
224
224
256
(bytes)
EEPROM Data Mem-
128
128
256
128
128
256
ory (bytes)
Timer module(s)
TMR0, TMR1, TMR0, TMR1, TMR0, TMR1, TMR0, TMR1, TMR0, TMR1, TMR0, TMR1,
TMR2
TMR2
TMR2
TMR2
TMR2
TMR2
Comparator(s)
2
2
2
2
2
2
Peripherals Capture/Compare/
1
1
1
1
1
1
PWM modules
Serial Communications
USART
USART
USART
USART
USART
USART
Internal Voltage
Reference
Yes
Yes
Yes
Yes
Yes
Yes
Interrupt Sources
10
10
10
10
10
10
I/O Pins
16
16
16
16
16
16
Features Voltage Range (Volts)
3.0-5.5
3.0-5.5
3.0-5.5
2.0-5.5
2.0-5.5
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.
 2002 Microchip Technology Inc.
Preliminary
DS40044A-page 5