ra8835 Topway Display, ra8835 Datasheet - Page 56

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

RAiO TECHNOLOGY INC.
Version 1.7
8-1-2 Initialization Example
Notes:
1. The remainder pixels on the right-hand side of the display are automatically blanked by the
2. Assuming a frame frequency of 60 Hz.
The initialization example shown in Figure 8-1 is for a RA8835 series with an 8-bit microprocessor
interface bus and a display unit (320 x 240 pixels).
Note: Set the cursor address to the start of each screen’s layer memory, and use MWRITE to fill
RA8835. There is no need to zero the display memory corresponding to these pixels.
256 x 128
512 x 128
the memory with space characters, 20H
only). Determining which memory to clear is explained in section 17-1-3.
remainder 2 = 2
blank pixels
[FX] = 8 pixels:
256 / 8 = 32
remainder 0 = no
blank pixels
[FX] = 10 pixels:
512 / 10 = 51
remainder 2 = 2
blank pixels
SYSTEM SET
HDOT SCR
DISP OFF
Supply on
SCROLL
OVLAY
Start
Figure 8-1: Initialization Procedure
8 or 16, depending
on the screen
8 or 16, depending
on the screen
56/86
Output display
Clear sceond
CSR FORM
Memory layer
Clear first
(text screen only) or 00H (graphics screen
Memory layer
DISP ON
CSRW
data
C/R = 54H. When
using HDOT SCR,
[C/R] = 86 bytes
[C/R] = 32 = 20H
bytes:
C/R = 19H. When
using HDOT SCR,
[C/R] = 33 bytes
[C/R] = 102 = 66H
bytes:
C/R = 65H. When
using HDOT SCR,
[C/R] = 103 bytes
Dot Matrix LCD Controller
www.raio.com.tw
22H
69H
RA8835
2.90
8.55