UPD75218 NEC, UPD75218 Datasheet - Page 36

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

36
Note MBE = 0, or MBE = 1 and MBS = 15 must be set when an IN/OUT instruction is executed.
Instruction
Subrou-
tine stack
control
Interrupt
control
I/O
Mnemonic
CALL
CALLA
CALLF
RET
RETS
RETI
PUSH
POP
EI
DI
IN
OUT
Note
Note
!addr
!addr1
!faddr
rp
BS
rp
BS
IE
IE
A,PORTn
XA,PORTn
PORTn,A
PORTn,XA
Operand
Number
of bytes
3
3
2
1
1
1
1
2
1
2
2
2
2
2
2
2
2
2
Machine
cycle
3 + S
4
3
3
3
3
1
2
1
2
2
2
2
2
2
2
2
2
(SP-6)(SP-3)(SP-4)
(SP-5)
(SP-2)
PC
(SP-6)(SP-3)(SP-4)
(SP-5)
(SP-2)
PC
(SP-6)(SP-3)(SP-4)
(SP-5)
(SP-2)
PC
PC
SP
PC
SP
then skip unconditionally
PC
PSW
(SP-1)(SP-2)
(SP-1)
SP - 2
rp
MBS
SP + 2
IME(IPS.3)
IE
IME(IPS.3)
IE
A
XA
PORTn
PORTn
, ,MBE,RBE
,PC
, ,MBE,RBE
,PC
,PC
14
14-0
14-0
11-0
11-0
11-0
14
14
14
PORTn (n=0 to 6)
(SP+1)(SP), SP
,PC
,PC
,PC
SP + 6
SP + 6
PORTn
+1
0, PC
(SP+4)(SP+5), SP
(SP+1), RBS
,PORTn
addr1, SP
0000, faddr, SP
(SP)(SP+3)(SP+2)
(SP)(SP+3)(SP+2)
(SP)(SP+3)(SP+2)
13
13
13
MBS, (SP-2)
1
0
0,PC
0,PC
0,PC
A (n=2 to 6)
, ,MBE,RBE
, ,MBE,RBE
, ,MBE,RBE
,PC
,PC
,PC
13-0
Operation
+1
14
14
14
1
0
12
12
12
,PORTn (n=4)
,PC
,PC
,PC
rp, SP
(SP+4)
(SP+4)
addr, SP
13
13
13
(SP+1)
(SP+1)
(SP+1)
XA (n=4)
, PC
, PC
, PC
PC
PC
PC
SP - 6
SP + 2
(SP), SP
11-0
12
11-0
12
11-0
12
RBS, SP
SP - 2
SP - 6
SP + 6
SP - 6
Address-
ing area
*11
*6
*9
Uncondition-
ally
Skip
condition
PD75218