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ST72361AR4-Auto 데이터시트(PDF) 224 Page - STMicroelectronics

부품명 ST72361AR4-Auto
상세설명  Clock, reset and supply management
PDF  279 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72361AR4-Auto 데이터시트(HTML) 224 Page - STMicroelectronics

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Instruction set
ST72361xx-Auto
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Doc ID 12468 Rev 3
18.2.1
Using a prebyte
The instructions are described with one to four opcodes.
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.
)
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
Table 90.
Instruction groups
Description
Instruction
Memo
Description
Function/example
Dst
Src
I1
H
I0
N
Z
C
ADC
Add with Carry
A = A + M + C
A
M
H
N
Z
C
ADD
Addition
A = A + M
A
M
H
N
Z
C
AND
Logical And
A = A . M
A
M
N
Z
BCP
Bit compare A,
Memory
tst (A . M)
A
M
N
Z
BRES
Bit Reset
bres Byte, #3
M
BSET
Bit Set
bset Byte, #3
M
BTJF
Jump if bit is false (0) btjf Byte, #3, Jmp1
M
C
BTJT
Jump if bit is true (1)
btjt Byte, #3, Jmp1
M
C



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