ST7FLU05MCE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7FLU05MCE

8-bit low cost, low pin-count MCU for automotive, with single voltage Flash memory, ADC, timers

STMicroelectronics 

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ST7LUS5, ST7LU05, ST7LU09

11 Instruction set

Instruction set

11.1

ST7 addressing modes

The ST7 core features 17 different addressing modes which can be classified in seven main

groups.

Table 53. Addressing mode groups

Group

Example

Inherent

nop

Immediate

t(s) Direct

Indexed

uc Indirect

rod ) Relative

P t(s Bit operation

ld A,#$55

ld A,$55

ld A,($55,X)

ld A,([$55],X)

jrne loop

bset byte,#5

lete uc The ST7 instruction set is designed to minimize the number of bytes required per

d instruction: To do so, most of the addressing modes may be divided in two submodes called

so ro long and short:

b P ● Long addressing mode is more powerful because it can use the full 64 Kbyte address

- O te space, however it uses more bytes and more CPU cycles.

) le ● Short addressing mode is less powerful because it can generally only access page

t(s o zero (0000h - 00FFh range), but the instruction size is more compact, and faster. All

s memory to memory instructions use short addressing modes only (CLR, CPL, NEG,

c b BSET, BRES, BTJT, BTJF, INC, DEC, RLC, RRC, SLL, SRL, SRA, SWAP)

OObbssoolleettee PPrroodduuct(s) - O The ST7 assembler optimizes the use of long and short addressing modes.

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