NT7502
System Bus Connection Pads (continue)
Pad No.
Symbol
I/O
Description
72
M/S
I
This terminal selects the master/slave operation for the NT7502 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.
4
CL
I/O
This is the display clock input terminal.
When the NT7502 chips are used in master/slave mode, the various CL
terminals must be connected.
3
FR
I/O
This is the liquid crystal alternating current signal I/O terminal
M/S = “H”: Output.
M/S = “L”: Input.
When the NT7502 chip is used in master/slave mode, the various FR terminals
must be connected.
5
DOF
I/O
This is the liquid crystal display blanking control terminal.
M/S = “H”: Output.
M/S = “L”: Input.
When the NT7502 chip is used in master/slave mode, the various DOF terminals
must be connected.
2
FRS
O
This is the output terminal for the static drive.
This terminal is only enabled when the static indicator display is ON in
master operation mode, and is used in conjunction with the FR terminal.
80
IRS
I
This terminal selects the resistors for the V0 voltage level adjustment
IRS = “H”, Use the internal resistors.
IRS = “L”, Do not use the internal resistors.
The V0 voltage level is regulated by an external resistive voltage divider
attached to the VR terminal.
This pad 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.
78
HPM
I
This is the power control terminal for the power supply circuit for liquid
crystal drive.
HPM
= “H”, Normal mode
HPM
= “L”, High power mode
This pad 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.
7
British ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
