UPD75P4308GS datasheet(17/60 Pages) NEC

17 / 60 page

µPD75P4308

7. INSTRUCTION SET

(1) Representation and coding formats for operands

In the instruction’s operand area, use the following coding format to describe operands corresponding to the

instruction’s operand representations (for further description, refer to RA75X Assembler Package User’s

Manual Language (EEU-1363)). When there are several codes, select and use just one. Uppercase letters,

and + and – symbols are key words that should be entered as they are.

For immediate data, enter an appropriate numerical value or label.

Instead of mem, fmem, pmem, bit, etc., a register flag symbol can be described as a label descriptor (for details,

refer to

µPD754304 User’s Manual (U10123E)). Labels that can be entered for fmem and pmem are restricted.

Representation

Coding format

reg

X, A, B, C, D, E, H, L

reg1

X, B, C, D, E, H, L

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

4-bit immediate data or label

8-bit immediate data or label

mem

8-bit immediate data or labelNote

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-1FFFH immediate data or label

addr1

0000H-1FFFH immediate data or label (in Mk II mode only)

caddr

12-bit immediate data or label

faddr

11-bit immediate data or label

taddr

20H-7FH immediate data (however, bit0 = 0) or label

PORTn

PORT0-PORT3, PORT5-PORT8

×××

IEBT, IECSI, IET0, IET1, IE0-IE2, IE4

RBn

RB0-RB3

MBn

MB0, MB15

Note When processing 8-bit data, only even addresses can be specified.

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