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2-1-2. CPU system composition
$
5
The CPU operation functons are shown in the following figure;
CPU
-
r-
User program
Peripherals
Memory
1
( " O ~ m e m o j y
KlROM 1 s
K2ROM 2 s
RAM memory
(KlRAM)
- -
PE
inter-
face
K ~ R O M
is
KlROM
2 s
Data rnernory
I
Instructions
I
register
-1
I
,
1
r
I
I
I
e----
---
e---
-
-
h
5
Y
. C
E :
u
a
a
I
T
Logic
~b
processing
Register
A
Input/
oulput
inter
face
a
ca
I
1
n
pu
t
/
ou
t
pu
t
control circuit
I
I
--
_ .
(Base unit)
Fig. 2-2. CPU
system composition
Notes:
1 . Program writing for the user program memory uses the KlRAM.
2. The CPU system composition does not coincide with the hardware.
3. A discreet circuit is obtained for K2CPU.
Simultaneous use of ROM and RAM is not possible.
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