Newhaven Display International Page 12 of
39
NHD-2
40128WG-BYGH-VZ#000C
Flowchart of communications with MPU
(1)Status Read
A status check must be performed before data is read or written.
Status check
The Status of T6963C can be read from the data lines.
RD
L
WR
H
CE
L
C/D
H
Do to D7
H
The T6963C status word format is as follows:
MSB
LSB
STA7 STA6 STA5 STA4 STA3 STA2 STA1 STA0
D7 D6 D5 D4 D3 D2 D1 D0
STA0 Check command execution capability
0:Disable
1:Enable
STA1 Check data read/write Capability
0:Disable
1:Enable
STA2 Check Auto mode data read capability
0:Disable
1:Enable
STA3 Check Auto mode data write capability
0:Disable
1:Enable
STA4 Not used
STA5 Check controller operation capability
0:Disable
1:Enable
STA6
Error flag. Used for Screen Peek and Screen copy
commands.
0:No error
1:Error
STA7 Check the blink condition
0:Disable off
1:Normal display
(Note 1) It is necessary to check STA0 and STA1 at the same time.
There is a possibility of erroneous operation due to a hardware interrupt.
(Note 2) For most modes STA0/STA1 are used as a status check.
(Note 3) STA2 and STA3 are valid in Auto mode; STA0 and STA1 are invalid.
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