SED1565 Datasheet, PDF (24/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
Pin Name I/O
CLS
I
M/S
I
Function
No. of
Pins
Terminal to select whether or enable or disable the display clock internal
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oscillator circuit.
CLS = “H”: Internal oscillator circuit is enabled
CLS = “L”: Internal oscillator circuit is disabled (requires external input)
When CLS = “L”, input the display clock through the CL terminal.
This terminal selects the master/slave operation for the SED1565 Series
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chips. Master operation outputs the timing signals that are required for the
LCD display, while slave operation inputs the timing signals required for the
liquid crystal display, synchronizing the liquid crystal display system.
M/S = “H”: Master operation
M/S = “L”: Slave operation
The following is true depending on the M/S and CLS status:
M/S CLS
Oscillator
Circuit
“H” “H”
“L”
“L” “H”
“L”
Enabled
Disabled
Disabled
Disabled
Power
Supply
Circuit
Enabled
Enabled
Disabled
Disabled
CL
FR FRS DOF
Output
Input
Input
Input
Output
Output
Input
Input
Output
Output
Output
Output
Output
Output
Input
Input
CL
FR
DOF
FRS
IRS
HPM
I/O This is the display clock input terminal
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The following is true depending on the M/S and CLS status.
M/S CLS CL
“H” “H” Output
“L” Input
“L” “H” Input
“L” Input
When the SED1565 Series chips are used in master/slave mode, the
various CL terminals must be connected.
I/O This is the liquid crystal alternating current signal I/O terminal.
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M/S = “H”: Output
M/S = “L”: Input
When the SED1565 Series chip is used in master/slave mode, the various
FR terminals must be connected.
I/O This is the liquid crystal display blanking control terminal.
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M/S = “H”: Output
M/S = “L”: Input
When the SED1565 Series chip is used in master/slave mode, the various
DOF terminals must be connected.
O This is the output terminal for the static drive.
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This terminal is only enabled when the static indicator display is ON when
in master operation mode, and is used in conjunction with the FR terminal.
I This terminal selects the resistors for the V5 voltage level adjustment.
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IRS = “H”: Use the internal resistors
IRS = “L”: Do not use the internal resistors. The V5 voltage level is
regulated by an external resistive voltage divider attached to the VR
terminal.
This pin is enabled only when the master operation mode is selected.
It is fixed to either “H” or “L” when the slave operation mode is selected.
I This is the power control terminal for the power supply circuit for liquid
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crystal drive.
HPM = “H”: Normal mode
HPM = “L”: High power mode
This pin is enabled only when the master operation mode is selected.
It is fixed to either “H” or “L” when the slave operation mode is selected.
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EPSON