PIC16F882-I/SP

The PIC16C5X from Microchip Technology is a family of low cost, high performance, 8-bit fully static, EPROM/ROM-based CMOS microcontrollers. It employs a RISC architecture with only 33 single word/ single cycle instructions. All instructions are single cycle except for program branches which take two cycles. The PIC16C5X delivers performance in an order of magnitude higher than its competitors in the same price category. The 12-bit wide instructions are highly symmetrical resulting in 2:1 code compression over other 8-bit microcontrollers in its class. The easy to use and easy to remember instruction set reduces development time significantly.

The high performance of the PIC16F62X family can be attributed to a number of architectural features commonly found in RISC microprocessors. To begin with, the PIC16F62X uses a Harvard architecture, in which, program and data are accessed from separate memories using separate buses. This improves bandwidth over traditional Von Neumann architecture where program and data are fetched from the same memory. Separating program and data memory further allows instructions to be sized differently than 8-bit wide data word. Instruction opcodes are 14-bits wide making it possible to have all single-word instructions. A 14-bit wide program memory access bus fetches a 14-bit instruction in a single cycle. A two-stage pipeline overlaps fetch and execution of instructions. Consequently, all instructions (35) execute in a single cycle (200 ns @ 20 MHz) except for program branches.

There are two memory blocks in each of these PIC® microcontrollers. Each block (Program Memory and Data Memory) has its own bus, so that concurrent access can occur. The PIC16C717/770/771 devices have a 13-bit program counter capable of addressing an 8K x 14 program memory space. The PIC16C717 and the PIC16C770 have 2K x 14 words of program memory. The PIC16C771 has 4K x 14 words of program memory. Accessing a location above the physically implemented address will cause a wrap-around. The RESET vector is at 0000h and the interrupt vector is at 0004h

• Enhanced Flash program memory: - 10,000 erase/write cycle (min.) for industrial temperature range, 100k (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 operation • Detects clock failure and switches to on-chip low power RC oscillator • Programmable code protection • In-Circuit Serial Programming™ (ICSP™) • Selectable Power Management modes - Sleep, Idle and Alternate Clock modes