參數(shù)資料
型號: ST72F324BK2T6
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, LQFP-32
文件頁數(shù): 9/167頁
文件大小: 2651K
代理商: ST72F324BK2T6
Instruction set
ST72323 ST72323L
106/167
10
Instruction set
10.1
CPU addressing modes
The CPU features 17 different addressing modes which can be classified into 7 main groups
as shown in Table 52.
The CPU instruction set is designed to minimize the number of bytes required per
instruction: To do so, most of the addressing modes may be subdivided in two submodes
called long and short:
Long addressing mode is more powerful because it can use the full 64 Kbyte address
space, however it uses more bytes and more CPU cycles.
Short addressing mode is less powerful because it can generally only access page
zero (0000h - 00FFh range), but the instruction size is more compact, and faster. All
memory to memory instructions use short addressing modes only (CLR, CPL, NEG,
BSET, BRES, BTJT, BTJF, INC, DEC, RLC, RRC, SLL, SRL, SRA, SWAP)
The ST7 Assembler optimizes the use of long and short addressing modes.
Table 52.
Addressing mode groups
Addressing mode
Example
Inherent
nop
Immediate
ld A,#$55
Direct
ld A,$55
Indexed
ld A,($55,X)
Indirect
ld A,([$55],X)
Relative
jrne loop
Bit operation
bset
byte,#5
Table 53.
CPU addressing mode overview
Mode
Syntax
Destination
Pointer
address
Pointer
size
Length
(bytes)
Inherent
nop
+ 0
Immediate
ld A,#$55
+ 1
Short
Direct
ld A,$10
00..FF
+ 1
Long
Direct
ld A,$1000
0000..FFFF
+ 2
No Offset
Direct
Indexed
ld A,(X)
00..FF
+ 0
Short
Direct
Indexed
ld A,($10,X)
00..1FE
+ 1
Long
Direct
Indexed
ld A,($1000,X)
0000..FFFF
+ 2
Short
Indirect
ld A,[$10]
00..FF
byte
+ 2
Long
Indirect
ld A,[$10.w]
0000..FFFF
00..FF
word
+ 2
Short
Indirect Indexed
ld A,([$10],X)
00..1FE
00..FF
byte
+ 2
Long
Indirect Indexed
ld A,([$10.w],X)
0000..FFFF
00..FF
word
+ 2
相關(guān)PDF資料
PDF描述
ST72F324BJ2T5 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
ST733C04LCK3LP 1900 A, 400 V, SCR, TO-200AC
ST733C04LCL3P 1900 A, 400 V, SCR, TO-200AC
ST733C04LCN0LP 1900 A, 400 V, SCR, TO-200AC
ST733C04LEP3P 1900 A, 400 V, SCR, TO-200AC
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