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UPD75402ACT Datasheet(PDF) 28 Page - NEC

Part # UPD75402ACT
Description  4 BIT SINGLE-CHIP MICROCOMPUTER
PDF  48 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD75402ACT Datasheet(HTML) 28 Page - NEC

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28
µPD75402A(A)
Instruc-
tion
group
Memory
bit
manipu-
lation
instruc-
tion
Branch
instruc-
tion
Subrou-
tine
stack
control
instruc-
tion
Interrupt
control
instruc-
tion
Input/
output
instruc-
tion
CPU
control
instruction
Mne-
monic
SET1
CLR1
SKT
SKF
SKTCLR
AND1
OR1
XOR1
BR
BRCB
CALLF
RET
RETS
RETI
PUSH
POP
EI
DI
IN
OUT
HALT
STOP
NOP
Number
of
bytes
2
2
2
2
2
2
2
2
2
2
2
2
–
1
2
2
1
1
1
1
1
2
2
2
2
2
2
2
2
1
Skip
condition
(mem.bit) = 1
(fmem.bit) = 1
(mem.bit) = 0
(fmem.bit) = 0
(fmem.bit) = 1
Uncondition-
ally
Address-
ing area
*2
*3
*2
*3
*2
*3
*2
*3
*3
*3
*3
*3
*4
*5
*6
*7
Ma-
chine
cycle
2
2
2
2
2 + S
2 + S
2 + S
2 + S
2 + S
2
2
2
–
2
2
2
3
3 + S
3
1
1
2
2
2
2
2
2
2
2
1
Operand
mem.bit
fmem.bit
mem.bit
fmem.bit
mem.bit
fmem.bit
mem.bit
fmem.bit
fmem.bit
CY, fmem.bit
CY, fmem.bit
CY, fmem.bit
addr
$addr
!caddr
!faddr
rp
rp
IE
×××
IE
×××
A, PORTn
PORTn, A
Operation
(mem.bit)
← 1
(fmem.bit)
← 1
(mem.bit)
← 0
(fmem.bit)
← 0
Skip if (mem.bit) = 1
Skip if (fmem.bit) = 1
Skip if (mem.bit) = 0
Skip if (fmem.bit) = 0
Skip if (fmem.bit) = 1 and clear
CY
← CY
∧ (fmem.bit)
CY
← CY
∨ (fmem.bit)
CY
← CY
∨ (fmem.bit)
PC10-0
← addr
(The assembler selects an
appropriate instruction from the
BRCB !caddr and BR $addr
instructions.)
PC10-0
← addr
PC10-0
← caddr
(SP – 4)(SP – 1)(SP – 2)
← 0, PC10-0
(SP – 3)
← 0000
PC10-0
← faddr, SP ← SP – 4
×, PC10-0 ← (SP)(SP + 3)(SP + 2)
SP
← SP + 4
×, PC10-0 ← (SP)(SP + 3)(SP + 2)
SP
← SP + 4, then skip unconditionally
×, PC10-0 ← (SP)(SP + 3)(SP + 2)
PSW
← (SP + 4)(SP + 5), SP ← SP + 6
(SP – 1)(SP – 2)
← rp, SP ← SP – 2
rp
← (SP + 1)(SP), SP ← SP + 2
IME (IPS.3)
← 1
IE
××× ← 1
IME (IPS.3)
← 0
IE
××× ← 0
A
← PORTn
(n = 0 - 3, 5, 6)
PORT n
← A
(n = 2, 3, 5, 6)
Set HALT mode (PCC.2
← 1)
Set STOP mode (PCC.3
← 1)
No operation



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