NT7502 Datasheet, PDF (29/54 Pages) List of Unclassifed Manufacturers – 65 X 132 RAM-Map LCD Controller / Driver

NT7502
19. Static Indicator (Double Byte Command)
This command controls the static drive system indicator display. The static indicator display is controlled by this command
only, and is independent of other display control commands.
This is used when one of the static indicator liquid crystal drive electrodes is connected to the FR terminal, and the other is
connected to the FRS terminal. A different pattern is recommended for the static indicator electrodes rather than for the
dynamic drive electrodes. If the pattern is too close, it can result in deterioration of the liquid crystal and of the electrodes.
The static indicator ON command is a double-byte command paired with the static indicator register set command, and thus
command must be executed one after the other. (The static indicator OFF command is a single byte command.)
! Static Indicator ON/OFF
When the static indicator ON command is entered, the static indicator register set command is enabled. Once the static
indicator ON command has been entered, no other command aside from the static indicator register set command can be
used. This mode is cleared when data is set in the register by the static indicator register set command.
A0 ^{E R / W} D7 D6 D5 D4 D3 D2 D1 D0
RD _WR
01 0 1010110D
D = 0: Static Indicator OFF
D = 1: Static Indicator ON
! Static Indicator Register Set
This command sets two bits of data into the static indicator register and is used to set the static indicator into a blinking
mode.
A0 ^{E R / W} D7 D6 D5 D4 D3 D2 D1 D0
RD _WR
Indicator Display State
0 1 0 * * * * * * 0 0 OFF
0 1 ON (blinking at approximately 0.5 second intervals
1 0 ON (blinking at approximately 1 second intervals
1 1 ON (constantly on)
* Disabled bit
20. Power Save (Compound Command)
When all displays are turned on during display off, the Power Save command is issued to greatly reduce current
consumption.
If the static indicators are off, the Power Save command drives the system into sleep mode. If on, this command drives the
system into standby mode.
Release the Sleep mode using both the Power Save OFF command (Display ON command or Entire Display OFF
command) and Set Indicator On command.
Static Indicator OFF
Static Indicator ON
Power Save
(Display OFF and Entire Display ON)
(Sleep mode)
(Standby mode)
Power Save OFF
(Display ON or Entire Displays OFF )
Static Indicator ON
(Sleep mode released) (Standby mode released)
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