UPD77018A NEC, UPD77018A Datasheet - Page 24

• Manufacturer Part Number: UPD77018A
• Description: 16 bits/ Fixed-point Digital Signal Processor
• Manufacturer: NEC

24
3.2 Instruction Set and Operation
descriptions can have only one selected.
ro, ro', ro"
rl, rl'
rh, rh'
re
reh
dp
dn
dm
dpx
dpy
dpx_mod
dpy_mod
dp_imm
An operation is written according to the rules for expressing. An expression of instructions having two or more
(a) Expressions and selectable registers
Expression
Expression and selectable registers are shown as follows.
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.
Selectable registers
PD77018A, 77019