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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LCD-III
Pay attention: When executing an input instruction to
output channel, the microcomputer reads unstabilized value
causing malfunction of the program.
When executing an input instruction (LAR and LBR) from
the data I/O, pay attention to time allowance after executing
an output instruction. At the time, the input sampling pulse
is generated during the first half of the instruction cycle.
1 Instruction Cycle
/ '
-..
on Set/Reset
-
Instruction
On
J
Rn Input
Instruction
Rn Sampling Pulse
I
T.
m
Pay attention to time allowance
In
such syste
as
is operated
by
On to read the result from Rn.
an extarna circuit
Applied Pins: INTo. INT,. Roo to Rn
No Pull up MOS
VCC
I/O
E~'
[--tf,---tos
I
NMOS
I
I
:
:
'"----
--~
With Pull up MOS (PMOS)
Figure 12 Configuration of Input Pins
Applied Pins: R30
to
Rn
No Pull up MOS
(Open Drain)
I/O Enable
CMOS Output
VCC
~r-
IroEi~b
4~NMO;
Figure 13 Configuration of Output Pins
Applied Pins: 0
0
to 0
13 •
O'4/XO. D,s/XI. R,o to Ru. R20 to Rn
No Pull upMOS
(Open Drain)
I/O
---:--~~!:~~
Enable
I
PMOS
I
•
I
I
:
~MOS
I
I
:
:
f.. ____ ..1
Input
h-eirCUit
t
With Pull up MOS (PMOS)
Vee
Vee
r--i---
1
PMOS:
PMOS
I
I
I
I
I
I
J
I
.
I
:
NMOS
I
I
""----.1
NMOS
~ g:~~it
1
Input
Circuit
I/O
Enable
~
I/O Enable
I/O Enable
(NOTE) In case that CMOS is chosen. external
input signal cennot be applied.
Figure 14 Configuration of Input/Output Pins
155
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