SPECIFICATIONS FOR LIQUID CRYSTAL DISPLAY MODULE
MODEL NO: 240128-06
Pacific Display Devices
03.07.2006
13
3. OPERATING PRINCIPALS AND METHODS
3.1 LCD Controller Display and Control Functions (T-6963C Controller)
■ Flowchart of Communications with MPU
● Status Read
Before sending data (Read/Write) command, it is necessary to check the status.
Status check
Status of T6963C can be read from data lines.
RD
L
WR
H
CE
L
C/D
H
D0-D7
Status word
T6963C status word format is following.
MSB
LSB
STA7
D7
STA6
D6
STA5
D5
STA4
D4
STA3
D3
STA2
D2
STA1
D1
STA0
D0
STA0
Check capability of command execution
0 : Disable
1 : Enable
STA1
Check capability of data read/write
0 : Disable
1 : Enable
STA2
Check capability of auto mode data read
0 : Disable
1 : Enable
STA3
Check capability of auto mode data write
0 : Disable
1 : Enable
STA4
Not use
STA5
Check capability of controller operation
0 : Disable
1 : Enable
STA6
Error flag. Using screen peek/copy command
0 : No error
1 : Error
STA7
Check the condition blink
0 : Display off
1 : Normal display
Note 1 : It is necessary to check STA0 and STA1 at the same time. The error is happened by sending data at executing
command.
Note 2 : The status check will be enough to check STA0/STA1.
Note 3 : STA2/STA3 are valid in auto mode STA0/STA1 are invalid.
Status checking flow
Note 4 : It is impossible to save status check in the case of command of MSB0. To have the delay time cannot be save status
check. The interrupt of hardware is happened at the end of lines. If command of MSB0 is sent in this period, the command
executing is waited. The state of waiting doesn’t be known without to check status. The sending next command or data is
disregarded or rewrites data of waiting command.
STATUS
RETURN
STA0=1
STA1=1
YES
NO
AUTO MODE
STATUS
RETURN
STA2=1
(STA3=1)
YES
NO
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