RA8835A
Version 1.0
Dot Matrix LCD Controller
6-4 Drawing Control Commands
6-4-1 CSRW
The 16-bit cursor address register contains the display memory address of the data at the cursor
position as shown in Figure 6-22. Note that the microprocessor cannot directly access the display
memory. The MREAD and MWRITE commands use the address in this register.
MSB
LSB
C
0
1
0
0
0
1
1
0
P1
P2
A7
A6
A5
A4
A3
A2
A1
A9
A0
A8
(CSRL)
(CSRH)
A15
A14
A13
A12
A11
A10
Figure 6-22: CSRW Parameters
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.
6-4-2 CSRR
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.
MSB
LSB
C
0
1
0
0
0
1
1
1
P1
P2
A7
A6
A5
A4
A3
A2
A1
A9
A0
A8
(CSRL)
(CSRH)
A15
A14
A13
A12
A11
A10
Figure 6-23: CSRR Parameters
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