RA6963
Preliminary Version 1.3
Status Checking Flow
Dot Matrix LCD Controller
a)
b)
STATUS
AUTO MODE STATUS
(*1)
STA0=1
STA1=1
(*1)
STA2=1 (Read)
or
NO
NO
STA3=1(Write)
YES
RETURN
YES
RETURN
< Figure 6-2 >
Note 4: When using the MSB=0 command, a Status Read must be performed.
If a status check is not carried out, the RA6963 cannot operate normally, even after a
delay time.
The hardware interrupt occurs during the address calculation period (at the end of each
line).
If a MSB=0 command is sent to the RA6963 during this period, the RA6963 enters Wait
status.
If a status check is not carried out in this state before the next command is sent, there is
the possibility that command or data will not be received.
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