LC587404A/06A/08A
Pin Name I/O
Function
State when reset
SO1 IN/OUT • 4-bit input port (shared with serial interface)
• Input mode
SO2 IN/OUT SO1:Serial input pin
• Pull-up or pull-down
SO3 IN/OUT SO2:Serial output pin
resistance : ON (OFF
SO4 IN/OUT SO3:Serial clock pin
after reset release)
• parallel serial transfer possible
• 4-bit parallel mode
• SO4 pin is in HALT mode when the serial function is not used
• Output Latch data :HIGH
and can be applied as a release source or an interrupt source.
• Pull-up or pull-down (controlled by program for each port) is
imbedded.
• Output format can be controlled for each port by program
(CMOS/Nch)
• “Level-hold function” that prevent floating is available
M1
IN/OUT • 4-bit input/output port
• Input mode
M2
IN/OUT • Pull-up or pull-down (controlled by program for each port) is
• Pull-up or pull-down
M3
IN/OUT imbedded.
resistance : ON (OFF
M4
IN/OUT • Output format can be controlled for each port by program
after reset release)
(CMOS/Pch)
• Output Latch data :HIGH
• M4 pin changes to be as a clock input pin when operating Timer 2
as an event counter mode.
• “Level-hold function” that prevent floating is available
P1
IN/OUT • 4-bit input/output port
P2
IN/OUT • Pull-up or pull-down (controlled by program for each port) is
P3
IN/OUT imbedded.
P4
IN/OUT • Output format can be controlled for each port by program
(CMOS/Pch)
• “Level-hold function” that prevent floating is available
• Input mode
• Pull-up or pull-down
resistance : ON (OFF
after reset release)
• Output Latch data :HIGH
N1
N2
N3
N4
SEG01
to
SEG23
COM1
COM2
COM3
COM4
RES
TST
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
• 4-bit output port
• Output format can be controlled for each port by program
(CMOS/Nch)
• Mid-withstand pressure when in Nch open drain format
• N3 pin is an output pin for remote control carrier signal.
• N4 pin is an output pin for alarm pulse signal.
• LCD pannel segment drive pin
• Can be applied for 6 types of drive formats.
• Used as a general output pin (CMOS, Pch, Nch) by program
• Can be combined with LCD drive pin and general purpose output
pin
• LCD pannel common electrode drive pin
• Uses from COM1 to COM4 according to LCD drive duty type
• LCD drive frequency (frame frequency) is determined by
program.
•Output level is determined
with an option.
IN • Input pin for the microcontroller reset
Reset signal of over 200 µs must be supplied.
• Input format and reset level are determined with an option.
IN • Test pin
• Must be connected to the VSS pin level (“-” side of the power)
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