A
ll
and more about Sharp PC-1500
at
http://www.PC-1500.info
o Memory backup function
o
LCD
back
plate controll
o Clock 2 .6MHz (crystal control)
Internal machine cycle ...... J.3MHz
Mininum instruction excute time ......
I .3µS
2-3. MPU block d i
agram
Control signal
Backpla
,.
48
b;t)
•
"8
¥0
.,,
:.
c
g 0
·-
u
li
::>
,
...
~~
.=
Back
plate
driver
Address
contr
ol
Internal register
l
nterool
bus
A
I..
u
t t i
%
Vee
GNO
t:
lnput
port
0
0.
48
b;11
~
,
Q
.=
0
Data bus
-
~
48
bit)
c
0
u
-
,
CD
Table below shows t
he
internal registers
of
the
MPU
that consist
of8·bit
x
14
RAM storages .
P11
P1.
S11
SL
Wu
WL
A
E
Uu
Ur.
...... Program counter
. .....
Stack
pointer
...... W register
...... A register, E register
......
U register
} iExclus
ive
registers
Yn
YL
...... Y register
General purpose register
Xu
x,
.
...... X register
MPU
registers consists
of
two groups
of
registers; exclusive register group and general purpose
register grou
p.
Exclusive registers consist
of
program counter (PH, PL) [16 bits) , stack pointer (SH, SL) [16
bits),
and W register
(WH,
WL)
(16 bits] .
General purpose registers consist
of
eight 8·bit registers; U register (UH, UL), X register (XH,
XL),
and Y register(YH, YL) can be used
in
pair to comprise 16-bit registers.
6
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not sale this PDF
!!!
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