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UPD754264 Datasheet(PDF) 39 Page - NEC

Part # UPD754264
Description  4-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  68 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD754264 Datasheet(HTML) 39 Page - NEC

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39
µPD754264
Instruction
Number
Number
Addressing
Mnemonic
Operand
of machine
Operation
Skip condition
group
of bytes
cycles
area
Transfer
MOV
A, #n4
1
1
A
← n4
String effect A
instruction
reg1, #n4
2
2
reg1
← n4
XA, #n8
2
2
XA
← n8
String effect A
HL, #n8
2
2
HL
← n8
String effect B
rp2, #n8
2
2
rp2
← n8
A, @HL
1
1
A
← (HL)
*1
A, @HL+
1
2+S
A
← (HL), then L ← L+1
*1
L = 0
A, @HL–
1
2+S
A
← (HL), then L ← L–1
*1
L = FH
A, @rpa1
1
1
A
← (rpa1)
*2
XA, @HL
2
2
XA
← (HL)
*1
@HL, A
1
1
(HL)
← A*1
@HL, XA
2
2
(HL)
← XA
*1
A, mem
2
2
A
← (mem)
*3
XA, mem
2
2
XA
← (mem)
*3
mem, A
2
2
(mem)
← A*3
mem, XA
2
2
(mem)
← XA
*3
A, reg
2
2
A
← reg
XA, rp'
2
2
XA
← rp'
reg1, A
2
2
reg1
← A
rp'1, XA
2
2
rp'1
← XA
XCH
A, @HL
1
1
A
↔ (HL)
*1
A, @HL+
1
2+S
A
↔ (HL), then L ← L+1
*1
L = 0
A, @HL–
1
2+S
A
↔ (HL), then L ← L–1
*1
L = FH
A, @rpa1
1
1
A
↔ (rpa1)
*2
XA, @HL
2
2
XA
↔ (HL)
*1
A, mem
2
2
A
↔ (mem)
*3
XA, mem
2
2
XA
↔ (mem)
*3
A, reg1
1
1
A
↔ reg1
XA, rp'
2
2
XA
↔ rp'
Table
MOVT
XA, @PCDE
1
3
XA
← (PC11–8+DE)ROM
reference
instructions
XA, @PCXA
1
3
XA
← (PC11–8+XA)ROM
XA, @BCDE
1
3
XA
← (BCDE)ROMNote
*6
XA, @BCXA
1
3
XA
← (BCXA)ROMNote
*6
Note Set “0” in register B.



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