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UPD754244 Datasheet(PDF) 46 Page - NEC

Part # UPD754244
Description  4-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  88 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD754244 Datasheet(HTML) 46 Page - NEC

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46
µPD754144, 754244
Instruction
Number
Number
Addressing
Mnemonic
Operand
of machine
Operation
Skip condition
group
of bytes
cycles
area
Subroutine
CALLANote
!addr1
3
3
(SP–2)
← ×, ×, MBE, RBE
*11
stack control
(SP–6) (SP–3) (SP–4)
← PC11–0
instructions
(SP–5)
← 0, 0, 0, 0
PC11–0
← addr1, SP ← SP–6
CALLNote
!addr
3
3
(SP–3)
← MBE, RBE, 0, 0
*6
(SP–4) (SP–1) (SP–2)
← PC11–0
PC11–0
← addr, SP ← SP–4
4
(SP–2)
← ×, ×, MBE, RBE
(SP–6) (SP–3) (SP–4)
← PC11–0
(SP–5)
← 0, 0, 0, 0
PC11–0
← addr, SP ← SP–6
CALLFNote
!faddr
2
2
(SP–3)
← MBE, RBE, 0, 0
*9
(SP–4) (SP–1) (SP–2)
← PC11–0
PC11–0
← 0+faddr, SP ← SP–4
3
(SP–2)
← ×, ×, MBE, RBE
(SP–6) (SP–3) (SP–4)
← PC11–0
(SP–5)
← 0, 0, 0, 0
PC11–0
← 0+faddr, SP ← SP–6
RETNote
13
PC11–0
← (SP) (SP+3) (SP+2)
MBE, RBE, 0, 0
← (SP+1), SP ← SP+4
×, ×, MBE, RBE ← (SP+4)
0, 0, 0, 0,
← (SP+1)
PC11–0
← (SP) (SP+3) (SP+2), SP ← SP+6
RETSNote
1
3+S
MBE, RBE, 0, 0
← (SP+1)
Unconditional
PC11–0
← (SP) (SP+3) (SP+2)
SP
← SP+4
then skip unconditionally
0, 0, 0, 0
← (SP+1)
PC11–0
← (SP) (SP+3) (SP+2)
×, ×, MBE, RBE ← (SP+4)
SP
← SP+6
then skip unconditionally
RETINote
1
3
MBE, RBE, 0, 0
← (SP+1)
PC11–0
← (SP) (SP+3) (SP+2)
PSW
← (SP+4) (SP+5), SP ← SP+6
0, 0, 0, 0
← (SP+1)
PC11–0
← (SP) (SP+3) (SP+2)
PSW
← (SP+4) (SP+5), SP ← SP+6
PUSH
rp
1
1
(SP–1) (SP–2)
← rp, SP ← SP–2
BS
2
2
(SP–1)
← MBS, (SP–2) ← RBS, SP ← SP–2
POP
rp
1
1
rp
← (SP+1) (SP), SP ← SP+2
BS
2
2
MBS
← (SP+1), RBS ← (SP), SP ← SP+2
Note
The above operations in the double boxes can be performed only in the Mk II mode. The other operations
can be performed only in the Mk I mode.



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