RA6963
Preliminary Version 1.3
Dot Matrix LCD Controller
6-5 Communications with MPU
6-5-1 Status Read
A status check must be performed before data is read or written.
Status Check
The Status of RA6963 can be read from the data lines.
< Table 6-3 >
RD
WR
CS
C/D
SD[7:0]
L
H
L
H
Status Word
The RA6963 status word format is as follows:
MSB
LSB
SD7
SD6
SD5
SD4
SD3
SD2
SD1
SD0
STA7 STA6 STA5 STA4 STA3 STA2 STA1 STA0
< Table 6-4 >
0: Disable
Check command execution capability
1: Enable
0: Disable
Check data read/write capability
1: Enable
0: Disable
Check Auto mode data read capability
1: Enable
STA0
STA1
STA2
0: Disable
Check Auto mode data write capability
1: Enable
Not used
0: Disable
Check controller operation capability
1: Enable
STA3
STA4
STA5
0: No error
Error flag. Used for Screen copy commands.
1: Error
STA6
STA7
0: Display off
Check the blink condition
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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