參數(shù)資料
型號: ST72651R6
英文描述: SODIMM MEMORY MODULE, 64MB, INDUSTRIAL TEMP
中文描述: ST7的-低功耗。全速USB 8位32K快閃微控制器。 5K內(nèi)存。閃存卡的I /樓計時器。脈寬調(diào)制。 ADC的。的I2C
文件頁數(shù): 27/166頁
文件大?。?/td> 2089K
代理商: ST72651R6
ST7265x
122/166
12 INSTRUCTION SET
12.1 CPU ADDRESSING MODES
The CPU features 17 different addressing modes
which can be classified in 7 main groups:
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 subdi-
vided in two sub-modes called long and short:
– Long addressing mode is more powerful be-
cause it can use the full 64 Kbyte address space,
however it uses more bytes and more CPU cy-
cles.
– 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 in-
structions 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 36. CPU Addressing Mode Overview
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
Mode
Syntax
Destination
Pointer
Address
(Hex.)
Pointer Size
(Hex.)
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
Relative
Direct
jrne loop
PC+/-127
+ 1
Relative
Indirect
jrne [$10]
PC+/-127
00..FF
byte
+ 2
Bit
Direct
bset $10,#7
00..FF
+ 1
Bit
Indirect
bset [$10],#7
00..FF
byte
+ 2
Bit
Direct
Relative
btjt $10,#7,skip
00..FF
+ 2
Bit
Indirect
Relative
btjt [$10],#7,skip
00..FF
byte
+ 3
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