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 PIC16F628A is 18-pin Flash-based members of the versatile PIC16F628A family of low-cost, high-performance, CMOS, fullystatic, 8-bit microcontrollers. All PIC? microcontrollers employ an advanced RISC architecture. The PIC16F628A 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.

The PIC16F630/676 devices have a 13-bit program counter capable of addressing an 8K x 14 program memory space. Only the first 1K x 14 (0000h-03FFh) for the PIC16F630/676 devices is physically implemented. Accessing a location above these boundaries will cause a wrap around within the first 1K x 14 space. The Reset vector is at 0000h and the interrupt vector is at 0004h

The PIC16F677 is a 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers. The following are the features:- ??17 1/0 Pins and I Input-only Pin: - High current source/sink for direct LED drive - ?Interrupt-on-Change pin - ?Individually programmable weak pull-ups - Ultra Low-power Wake-up (LJLPWU) ? Analog Comparator Module With: - TWO analog comparators - Programmable on-chip voltage reference (CVREF) module (% of Voo) - Comparator inputs and outputs externally accessible - SR Latch mode - Timer I Gate Sync Latch -?Fixed O.6VVREF ? AID Converter:??ID-bit resolution and 12 channels ? Timer 8-Bit Timer/Counter With 8-Bit rammable Prescaler

The PIC16F684 has a 13-bit program counter capable of addressing an 8k x 14 program memory space. Only the first 2k x 14 (0000h-07FFh) for the PIC16F684 is physically implemented. Accessing a location above these boundaries will cause a wrap around within the first 2k x 14 space. The Reset vector is at 0000h and the interrupt vector is at 0004h