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UPD7564 Datasheet(PDF) 30 Page - NEC

Part # UPD7564
Description  4-BIT SINGLE-CHIP MICROCOMPUTER
PDF  56 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD7564 Datasheet(HTML) 30 Page - NEC

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Mne-
Ope-
Operation Code
Operation
Skip
monic
rands
B1
B2
Condition
LAI
n4
0001
I3
I2
I1
I0
A
←n4
Loads n4 to the accumulator.
Stack LAI
LHI
n2
001010
I1
I0
H
←n2
Loads n2 to H register.
LAM
pr
010100
R1 R0
A
←(pr) pr = HL –, HL +, HL
Loads the contents of the memory
L = FH(HL –)
address by pr to the accumulator.
L = 0 (HL +)
LHLI
n5
1
1
0
I4
I3
I2
I1
I0
H
←0I4, L←I3–0
Loads n5 to the pair register HL.
Stack LHLI
ST
01010111
(HL)
←A
Stores the contents of the accumulator
in the memory addressed by HL.
STII
n4
0100
I3
I2
I1
I0
(HL)
←n4, L←L+1
Stores n4 in the memory addressed by
HL and increments the L register.
XAL
01111011
A
↔L
Exchanges the contents of the accumu-
lator and the L register.
XAM
pr
010101
R1 R0
A
↔(pr) pr = HL – , HL + , HL
Exchanges the contents of the accumu-
L = FH(HL–)
lator and the memory addressed by pr.
L = 0 (HL+)
AISC
n4
0000
I3
I2
I1
I0
A
←A + n4
Adds the accumulator to n4.
Carry
ASC
01111101
A
←A + (HL)
Adds the contents of the accumulator
Carry
and the memory addressed by HL.
Adds the contents of the accumulator,
ACSC
01111100
A, C
←A + (HL) + C
the memory addressed by HL, and of
Carry
the carry flag.
Calculate the exclusive OR of the
EXL
01111110
A
←A ∀ (HL)
contents of the accumulator and the
memory addressed by HL.
CMA
01111111
A
←A
––
Complements the accumulator.
RC
01111000
C
←0
Resets the carry flag.
SC
01111001
C
←1
Sets the carry flag.
ILS
01011001
L
←L + 1
Increments the L register.
L = 0
IDRS
mem
001111010
0
D5 D4 D3 D2 D1 D0
(mem)
←(mem) + 1
Increments the contents of the memory
(mem) = 0
addressed by mem.
DLS
01011000
L
←L – 1
Decrements the L register.
L = FH
DDRS
mem
001111000
0
D5 D4 D3 D2 D1 D0
(mem)
←(mem) – 1
Decrements the contents of the memory
(mem) = FH
addressed by mem.
RMB
bit
011010
B1 B0
(HL)bit
←0
Resets the bits specified by B1–0, of the
memory addressed by HL.
SMB
bit
011011
B1 B0
(HL)bit
←1
Sets the bits specified by B1–0, of the
memory addressed by HL.
Note
Instruction Group
Note



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