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132 www.xilinx.com Virtex-5 FPGA ML561 User Guide
UG199 (v1.2) April 19, 2008
Appendix C: LCD Interface
R
Reverse display ON/OFF001010011REV
REV RAM bit data = '1' RAM bit data = '0'
0 Pixel ON Pixel OFF
1 Pixel OFF Pixel ON
Entire display ON/OFF001010010EON
This instruction forces the display to be turned on regardless the contents of the display data RAM. The contents of the display data RAM are
saved. This instruction has priority over reverse display.
LCD bias select 0 0 1 010001BIAS
This instruction selects the LCD bias.
Duty
ratio
Bias = 0 Bias = 1
1/65 1/7 1/9
Set modify-read 0011100000
This instruction stops the automatic incrementing of the column address by a read operation. The automatic increment is still done with a
write operation.
Reset modify-read0011101110
This instruction resets the changed modify-read to the normal.
Reset 0011100010
This instruction resets the LCD controller registers to the default values. The instruction CANNOT initialize the LCD power supply initialized
with RESETB.
SHL select 0 0 1 1 0 0 SHL x x x
This instruction sets the COM output scanning direction.
SHL = 0, COM1 ----> COM64 (default)
SHL = 1, COM64 ----> COM1
Power Control 0000101VCVRVF
This instruction selects one of the eight power circuit functions. In the case of the DisplayTech 64128EFCBC display, these must be kept at "000"
Regulator resistor select 0 0 0 0100R2R1R0
This instruction selects the resistor ratio Rb/Ra.
Set static indicator mode001010110SM
Set static indicator register00xxxxxxS1S0
This is a two-byte instruction. The first instruction enables the second instruction. The second instruction update the contents of the static
indicator register.
Table C-6: Display Instructions (Continued)
Instruction RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0