参数资料
型号: ST72F60E1M1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO24
封装: 0.300 INCH, LEAD FREE, PLASTIC, SOP-24
文件页数: 9/139页
文件大小: 1993K
代理商: ST72F60E1M1
Instruction set
ST7260xx
106/139
Using a pre-byte
The instructions are described with one to four bytes.
In order to extend the number of available opcodes for an 8-bit CPU (256 opcodes), three
different prebyte opcodes are defined. These prebytes modify the meaning of the instruction
they precede.
The whole instruction becomes:
PC-2
End of previous instruction
PC-1
Prebyte
PC
Opcode
PC+1
Additional word (0 to 2) according to the number of bytes required to compute
the effective address
These prebytes enable instruction in Y as well as indirect addressing modes to be
implemented. They precede the opcode of the instruction in X or the instruction using direct
addressing mode. The prebytes are:
PDY 90
Replace an X based instruction using immediate, direct, indexed, or inherent
addressing mode by a Y one.
PIX 92
Replace an instruction using direct, direct bit, or direct relative addressing
mode to an instruction using the corresponding indirect addressing mode.
It also changes an instruction using X indexed addressing mode to an
instruction using indirect X indexed addressing mode.
PIY 91
Replace an instruction using X indirect indexed addressing mode by a Y one.
Table 53.
Instruction groups
Group
Instruction
Load and Transfer
LD
CLR
Stack operation
PUSH
POP
RSP
Increment/Decrement
INC
DEC
Compare and Tests
CP
TNZ
BCP
Logical operations
AND
OR
XOR
CPL
NEG
Bit Operation
BSET
BRES
Conditional Bit Test and Branch
BTJT
BTJF
Arithmetic operations
ADC
ADD
SUB
SBC
MUL
Shift and Rotates
SLL
SRL
SRA
RLC
RRC
SWAP
SLA
Unconditional Jump or Call
JRA
JRT
JRF
JP
CALL
CALLR
NOP
RET
Conditional Branch
JRxx
Interruption management
TRAP
WFI
HALT
IRET
Condition Code Flag modification
SIM
RIM
SCF
RCF
相关PDF资料
PDF描述
ST72F60K2DIE1 8-BIT, MROM, 8 MHz, MICROCONTROLLER, UUC
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参数描述
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