5-6 Chapter 5: Programming
Set Low Power State On
Description
This state is used to reduce Retail Display power consumption and extend the life of
the Retail Display. Power is only removed from the display and the display is not
refreshed. The Retail Display controller is still fully operational and continues to
accept commands. This command causes the firmware to blank or turn off the Retail
Display. Display data can be processed while the display is in the Low Power state,
but it does not appear until the Low Power state is changed. The displayed character’s
state is preserved so that upon leaving the Low Power State the display is restored.
To leave the Low Power State, one of the other state commands must be received.
This is the default state for the Retail Display after power–up.
Enable Cursor
Description
This command causes a flashing cursor to be used whenever the Display On state is in
force. When the cursor is enabled, the firmware shows a visible flashing cursor at the
current cursor position. The flashing cursor should be visible for one second and then
the character at the cursor position should be visible for one second. The effect is to
alternate between the character and the cursor. The cursor is defined as character 095
of whatever character set is currently chosen. For the three supported character sets,
the cursor is the bottom row of pixels turned on. For a user–defined character set, the
cursor becomes whatever is defined as character 095 of the character set. When the
cursor is enabled, it overwrites the character at the cursor position. If the cursor is
disabled, the character at the cursor position is left visible.
Disable Cursor
Description
This command causes the cursor to be turned off. This is the default state for the
cursor after power–up. A disabled cursor does not overwrite a displayed character.
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