UPD77018A Datasheet, PDF (24/56 Pages) NEC – 16 bits, Fixed-point Digital Signal Processor

µPD77018A, 77019
3.2 Instruction Set and Operation
An operation is written according to the rules for expressing. An expression of instructions having two or more
descriptions can have only one selected.
(a) Expressions and selectable registers
Expression and selectable registers are shown as follows.
Expression
ro, ro', ro"
rl, rl'
rh, rh'
re
reh
dp
dn
dm
dpx
dpy
dpx_mod
dpy_mod
dp_imm
∗×××
Selectable registers
R0 - R7
R0L - R7L
R0H - R7H
R0E - R7E
R0EH - R7EH
DP0 - DP7
DN0 - DN7
DMX, DMY
DP0 - DP3
DP4 - DP7
DPn, DPn++, DPn– –, DPn##, DPn%%, !DPn## (n = 0 - 3)
DPn, DPn++, DPn– –, DPn##, DPn%%, !DPn## (n = 4 - 7)
DPn##imm (n = 0 - 7)
content of memory address ×××
Example When the content of DP0 register is 1000, ∗DP0 shows the content of memory
address 1000.
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