RA8835A Datasheet, PDF (33/88 Pages) RAIO Technology Inc. – DOT MATRIX LCD CONTROLLER SPECIFICATION

Version 1.0
RA8835A
Dot Matrix LCD Controller
6-5 Memory Control Commands
6-5-1 MWRITE
The microprocessor may write a sequence of data bytes to display memory by issuing the MREAD
command and then writing the bytes to the RA8835A series. There is no need for further MWRITE
commands or for the microprocessor to update the cursor address register after each byte as the
cursor address is automatically incremented by the amount set with CSRDIR, in preparation for the
next data write.
MSB
LSB
C0
1
0
0
0
0
1
0
P1
P2
Pn
N>1
Figure 6-24: MWRITE Parameters
Note: P1, P2, ..., Pn: display data.
6-5-2 MREAD
Put the RA8835A series into the data output state. Each time the microprocessor reads the buffer,
the cursor address is incremented by the amount set by CSRDIR and the next data byte fetched
from memory, so a sequence of data bytes may be read without further MREAD commands or by
updating the cursor address register. If the cursor is displayed, the read data will be from two
positions ahead of the cursor.
MSB
LSB
C0
1
0
0
0
0
1
1
P1
P2
Pn
N>1
Figure 6-25: MREAD Parameters
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