RA8835A
Version 1.0
Dot Matrix LCD Controller
6-3 Display Control Commands
6-3-1 DISP ON/OFF
Turn the whole display on or off. The single-byte parameter enables and disables the cursor and
layered screens, and sets the cursor and screen flash rates. The cursor can be set to flash over
one character or over a whole line.
MSB
LSB
C
0
1
0
1
1
0
0
D
P1
FP5
FP4 FP3
FP2
FP1
FP0
FC1 FC0
Figure 6-10: DISP ON/OFF Parameters
6-3-1-1 D
Turn the display ON or OFF. The D bit takes precedence over the FP bits in the parameter.
D = 0: Display OFF
D = 1: Display ON
6-3-1-2 FC
Enables/disables the cursor and sets the flash rate. The cursor flashes with a 70% duty cycle
(ON/OFF).
Table-9: Cursor Flash Rate Selection
FC1
0
FC0
0
Cursor display
OFF (blank)
0
1
No flashing
Flash at fFR/32 Hz
(approx. 2 Hz)
Flash at fFR/64 Hz
(approx. 1 Hz)
1
1
0
1
ON
Note: As the MWRITE command always enables the cursor, the cursor position can be checked
even when performing consecutive writes to display memory while the cursor is flashing.
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