Hitachi AP1 Data Book page 367

---------------------------------------------------------------------------HMCS404CL
(P)
Referred ROM Address
(a) Address Designation
: If RO s
=
1
: If R0
9
=
1
(b) Pattern Output
Fig. 23 P Instruction
• P
Instruction
The P instruction refers ROM data addressed by Table Data
Addressing. ROM data addressed also determine its destination.
When bit 8 in referred ROM data is "1", 8 bits of referred
t---::=-:------I~~:~-1)+
255
8R A/4.A 2S6n
+
254
t--_ _
BR_B_BB _ _
-l
~~:~n+/,~5
BBB NQP
Fig. 24 The Branch Destination by BR Instruction on
the Boundary between Pages
365
ROM data are written into the accumulator and B Register.
When bit 9 is "1", 8 bits of referred ROM data are written into
the Rl and R2 port output register. When both bit 8 and 9 are
"1 ", ROM data are written into the accumulator and B Register
and also to the Rl and R2 port output register at a same time.
The P instruction has no effect on the program counter.
• INSTRUCTION SET
The HMCS400 series provide 99 instructions. These instruc-
tions are classified into 10 groups as follows;
(1)
Immediate Instruction
(2) Register-to-Register Instruction
(3) RAM Address Instruction
(4) RAM Register Instruction
(5) Arithmetic Instruction
(6) Compare Instruction
(7) RAM Bit Manipulation Instruction
(8) ROM Address Instruction
(9) Input/Output Instruction
(10) Control Instruction