UPD75517 Datasheet, PDF (147/180 Pages) NEC – 4 BIT SINGLE-CHIP MICROCOMPUTER

µPD75517(A)
8.2 INSTRUCTION SET AND ITS OPERATION
(1) Representation format and description method of operands
An operand is described in the operand field of each instruction according to the description method
corresponding to the operand representation format of the instruction. Refer to the assembler specifi-
cations for details. When two or more elements are described in the description method field, select one
of them. Uppercase letters, a plus sign (+), and a minus sign (-) are keywords, so they can be used without
alteration.
Specify an appropriate numeric value or label for immediate data.
Representa-
tion format
Description method
reg
X, A, B, C, D, E, H, L
reg1
X, B, C, D, E, H, L
rp
XA, BC, DE, HL
rp1
BC, DE, HL
rp2
BC, DE
rp’
XA, BC, DE, HL, XA’, BC’, DE’, HL’
rp’1
BC, DE, HL, XA’, BC’, DE’, HL’
rpa
HL, HL+, HL-, DE, DL
rpa1
DE, DL
n4
4-bit immediate data or label
n8
8-bit immediate data or label
mem
8-bit immediate data or label^Note
bit
2-bit immediate data or label
fmem
FB0H-FBFH/FF0H-FFFH immediate data or label
pmem
FC0H-FFFH immediate data or label
addr
0000H-3F7FH immediate data or label
addr1
0000H-5F7FH immediate data or label
caddr
12-bit immediate data or label
faddr
11-bit immediate data or label
taddr
20H-7FH immediate data (bit 0 = 0) or label
PORTn
PORT0-PORT15
IE×××
IEBT, IECSI0, IET0, IE0, IE1, IE2, IE4, IEW, IETPG
RBn
RB0-RB3
MBn
MB0, MB1, MB2, MB3, MB15
Note Only even addresses can be specified for 8-bit data processing.
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