PIC18F452-I/P

• Enhanced Flash program memory: - 10,000 erase/write cycle (min.) for industrial temperature range, 100K (typical) • Data EEPROM memory: - 100,000 erase/write cycle (min.) for industrial temperature range, 1M (typical) • Self-reprogrammable under software control • Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST) • Flexible Watchdog Timer (WDT) with on-chip low-power RC oscillator for reliable operation • Fail-Safe Clock Monitor (FSCM) operation • Detects clock failure and switches to on-chip Low-Power RC (LPRC) oscillator • Programmable code protection • In-Circuit Serial Programming™ (ICSP™) programming capability • Selectable Power Management modes - Sleep, Idle and Alternate Clock modes

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 set

The PIC16C781/782 devices have a 13-bit program counter capable of addressing an 8K x 14 program memory space. The PIC16C781 has 1K x 14 words of program memory. The PIC16C782 has 2K x 14 words of program memory. Accessing a location above the physically implemented address causes a wraparound. The RESET vector is at 0000h and the interrupt vector is at 0004h.