Xilinx MIcroBlaze Development Spartan-3E 1600E Kit User Manual page 49

R
Table 5-3: LCD Character Display Command Set (Continued)
Disabled
If the LCD_E enable signal is Low, all other inputs to the LCD are ignored.
Clear Display
Clear the display and return the cursor to the home position, the top-left corner.
This command writes a blank space (ASCII/ANSI character code 0x20) into all DD RAM
addresses. The address counter is reset to 0, location 0x00 in DD RAM. Clears all option
settings. The I/D control bit is set to 1 (increment address counter mode) in the
Set
Execution Time: 82 s – 1.64 ms
Return Cursor Home
Return the cursor to the home position, the top-left corner. DD RAM contents are
unaffected. Also returns the display being shifted to the original position, shown in
Figure
The address counter is reset to 0, location 0x00 in DD RAM. The display is returned to its
original status if it was shifted. The cursor or blink move to the top-left character location.
Execution Time: 40 s – 1.6 ms
Entry Mode Set
Sets the cursor move direction and specifies whether or not to shift the display.
These operations are performed during data reads and writes.
Execution Time: 40 s
Bit DB1: (I/D) Increment/Decrement
MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide
UG257 (v1.1) December 5, 2007
Function
Set CG RAM Address
Set DD RAM Address
Read Busy Flag and
Address
Write Data to CG RAM or
DD RAM
Read Data from CG RAM
or DD RAM
command.
5-3.
0 Auto-decrement address counter. Cursor/blink moves to left.
1 Auto-increment address counter. Cursor/blink moves to right.
Upper Nibble
0 0 0 1 A5
0 0 1 A6 A5
0 1 BF A6 A5
1 0 D7 D6 D5
1 1 D7 D6 D5
LCD Controller
Lower Nibble
A4 A3 A2 A1 A0
A4 A3 A2 A1 A0
A4 A3 A2 A1 A0
D4 D3 D2 D1 D0
D4 D3 D2 D1 D0
Entry Mode
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