ra8835 Topway Display, ra8835 Datasheet - Page 30

• Manufacturer Part Number: ra8835
• Description: Dot Matrix Lcd Controller
• Manufacturer: Topway Display

RAiO TECHNOLOGY INC.
Version 1.7
6-5 Memory Control Commands
6-4-2 CSRR
6-5-1 MWRITE
The cursor address register can only be modified by the CSRW command, and by the automatic
increment after an MREAD or MWRITE command. It is not affected by display scrolling. If a new
address is not set, display memory accesses will be from the last set address or the address after
previous automatic increments.
Read from the cursor address register. After issuing the command, the data read address is read
twice, for the low byte and then the high byte of the register.
The microprocessor may write a sequence of data bytes to display memory by issuing the MREAD
command and then writing the bytes to the RA8835 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.
P1
P2
C
MSB
P1
P2
C
Pn
P1
P2
C
MSB
A15
A7
MSB
0
A15
A7
0
0
A14
Figure 6-24: MWRITE Parameters
A6
1
Figure 6-22: CSRW Parameters
A14
Figure 6-23: CSRR Parameters
A6
1
1
A13
A5
0
A13
A5
0
0
A12
A4
A12
A4
0
0
30/86
0
A11
A11
A3
A3
0
0
0
A10
A2
A10
1
A2
1
0
A1
A9
1
A1
A9
1
1
A0
A8
0
A0
A8
LSB
1
0
LSB
LSB
(CSRH)
(CSRL)
N>1
(CSRH)
(CSRL)
Dot Matrix LCD Controller
www.raio.com.tw
RA8835