Read/Write Characteristics (6800 Mode) - Xilinx Virtex-4 ML461 User Manual

R
Table B-7: Display Instructions (Continued)
Instruction
Set modify-read
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-read
This instruction resets the changed modify-read to the normal.
Reset
This instruction resets the LCD controller registers to the default values. The instruction CANNOT initialize the LCD power supply initialized
with RESETB.
SHL select
This instruction sets the COM output scanning direction.
SHL = 0, COM1 ----> COM64 (default)
SHL = 1, COM64 ----> COM1
Power Control
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
This instruction selects the resistor ratio Rb/Ra.
Set static indicator mode
Set static indicator register
This is a two-byte instruction. The first instruction enables the second instruction. The second instruction update the contents of the static
indicator register.

Read/Write Characteristics (6800 Mode)

Table B-8: Read/Write Characteristics in 6800 Mode
Virtex-4 ML461 Development Board User Guide
UG079 (v1.1) September 5, 2007
RS RW DB7
0 0 1
0 0 1
0 0 1
0 0 1
0 0 0
0 0 0
0 0 1
0 0 x
Parameter
Address setup time
Address hold time
Data setup time
DB7 to DB0
Data hold time
Access time
Output disable time
System cycle time
Enable pulse width Read/write
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DB6 DB5 DB4
1 1 0
1 1 0
1 1 0
1 0 0
0 1 0
0 1 0
0 1 0
x x x
Signal Symbol
T
AS
RS
T
AH
T
DS
T
DH
T
ACC
T
OD
RS T
CYC
E_RD
Hardware Schematic Diagram
DB3 DB2 DB1
0 0 0
1 1 1
0 0 1
SHL x x
1 VC VR
0 R2 R1
1 1 0
x x S1
Min Typ Max
13 - -
17 - -
35 - -
13 - -
- - 125
10 - 90
400 - -
T 125 -
PWR
T 55 -
PWW
DB0
0
0
0
x
VF
R0
SM
S0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
99