
No. 6008-9/15
LC587208A, 587206A, 587204A, 587202A
Continued from preceding page.
Pin
I/O
Function
State during a reset
4-bit I/O port (also used for the serial interface)
SO1: Serial interface input
SO2: Serial interface output
SO3: Serial interface clock
The serial interface can also be used as a 2-wire interface.
When the serial interface function is not used, the SO4 pin can be used to
clear halt mode or as an interrupt pin.
Pull-up and pull-down resistors, which can be enabled or disabled under
program control in a single port unit, are built in.
The output circuit type can be switched under program control in a single
port unit. (CMOS/n-channel)
A level hold function, which is designed to prevent input floating states
from occurring on these pins, is also available as an option.
Input mode
Pull-down or pull-up resistors: enabled
(After the reset is cleared: disabled)
Level hold function: operation disabled
(After the reset is cleared: operation starts)
4-bit parallel mode
Output latch data: high
SO1
SO2
SO3
SO4
I/O
I/O
I/O
I/O
4-bit I/O port
Pull-up and pull-down resistors, which can be enabled or disabled under
program control in a single port unit, are built in.
The output circuit type can be switched under program control in a single
port unit. (CMOS/n-channel)
The M4 pin functions as a clock input when timer 2 is operated in event
counter mode.
A level hold function, which is designed to prevent input floating states
from occurring on these pins, is also available as an option.
Input mode
Pull-down or pull-up resistors: enabled
(After the reset is cleared: disabled)
Level hold function: operation disabled
(After the reset is cleared: operation starts)
Output latch data: high
M1
M2
M3
M4
I/O
I/O
I/O
I/O
4-bit I/O port
Pull-up and pull-down resistors, which can be enabled or disabled under
program control in a single port unit, are built in.
The output circuit type can be switched under program control in a single
port unit. (CMOS/n-channel)
A level hold function, which is designed to prevent input floating states
from occurring on these pins, is also available as an option.
Input mode
Pull-down or pull-up resistors: enabled
(After the reset is cleared: disabled)
Level hold function: operation disabled
(After the reset is cleared: operation starts)
Output latch data: high
P1
P2
P3
P4
I/O
I/O
I/O
I/O
4-bit output port
The output circuit type can be switched under program control in 1-bit
units. (CMOS/n-channel)
This port handles medium-level voltages when the n-channel open-drain
output circuit type is selected.
N3 is the remote controller carrier signal output pin.
N4 is the alarm pulse signal output pin.
The output levels are specified as mask options
N1
N2
N3
N4
Output
Output
Output
Output
LCD panel segment drive pins
Six drive techniques are supported.
These pins can be used as general-purpose outputs (either CMOS,
p-channel, or n-channel) by specifying mask options.
Any combination of LCD drive and general-purpose output pins can be set
up.
The LCD drive state is specified as a mask option.
(Either all lit or all off.)
The LCD driver/controller either operates or stops
depending on the oscillator specifications and other
mask options.
The states of those pins set up as general-purpose
outputs are determined by the mask options.
If all segments lit is specified: High or off.
If all segments off is specified: Low or off.
SEG1
to
SEG23
Output
Output
LCD panel common plate drive pins
One of four pins COM1 to COM4 is selected according to the LCD drive
duty technique used.
The LCD drive frequency (frame frequency) is determined by the mask
option.
The LCD driver/controller either operates or stops
depending on the oscillator specifications and other
mask options
COM1
COM2
COM3
COM4
Output
Output
Output
Output
Microcontroller reset input
Applications must apply the reset signal level for at least 200 μs.
The input circuit and the reset level are specified as mask options.
RES
Input
Test input
This pin must be tied to the VSS level (the minus side of the power
supply).
TST
Input