PIC16F648A 8-bit Microcontrollers – MCU 7KB 256 RAM 16 I/O SMD
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 PIC® 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
PIC16F627A/628A/648A microcontrollers typically
achieve a 2:1 code compression and a 4:1 speed
improvement over other 8-bit microcontrollers in their
PIC16F627A/628A/648A devices have integrated
features to reduce external components, thus reducing
system cost, enhancing system reliability and reducing
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