STM8L051F3 datasheet(12/46 Pages) STMICROELECTRONICS

12 / 46 page

Functional overview

STM8L051F3

12/46

Doc ID 022985 Rev 1

3.2

Central processing unit STM8

3.2.1

Advanced STM8 Core

The 8-bit STM8 core is designed for code efficiency and performance with an Harvard

architecture and a 3-stage pipeline.

It contains 6 internal registers which are directly addressable in each execution context, 20

addressing modes including indexed indirect and relative addressing, and 80 instructions.

Architecture and registers

●

Harvard architecture

●

3-stage pipeline

●

32-bit wide program memory bus - single cycle fetching most instructions

●

X and Y 16-bit index registers - enabling indexed addressing modes with or without

offset and read-modify-write type data manipulations

●

8-bit accumulator

●

24-bit program counter - 16-Mbyte linear memory space

●

16-bit stack pointer - access to a 64-Kbyte level stack

●

8-bit condition code register - 7 condition flags for the result of the last instruction

Addressing

●

20 addressing modes

●

Indexed indirect addressing mode for lookup tables located anywhere in the address

space

●

Stack pointer relative addressing mode for local variables and parameter passing

Instruction set

●

80 instructions with 2-byte average instruction size

●

Standard data movement and logic/arithmetic functions

●

8-bit by 8-bit multiplication

●

16-bit by 8-bit and 16-bit by 16-bit division

●

Bit manipulation

●

Data transfer between stack and accumulator (push/pop) with direct stack access

●

Data transfer using the X and Y registers or direct memory-to-memory transfers

3.2.2

Interrupt controller

The low density value line STM8L05xxx features a nested vectored interrupt controller:

●

Nested interrupts with 3 software priority levels

●

32 interrupt vectors with hardware priority

●

Up to 17 external interrupt sources on 11 vectors

●

Trap and reset interrupts

STM8L051F3 датащи(PDF) 12 Page - STMicroelectronics

STM8L051F3 датащи(HTML) 12 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

датащи скачать

ссылки URL