ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 38

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
TECHNOLOGY INC.
6-2-3 Com/Seg Scan Direction
6-2-4 Idle Time Counter (ITCR)
ITCR(REG[90h]) is used to determine the idle time during the LP peer-to-peer time. It has following
meanings in function.
The “Flicker” is generated by the violation of LCD scan cycle and Memory write cycle. “Flicker”
means the noise of the scan data at such violation. By setting the ITCR, user can write the display
memory only at “Idle” time to eliminate the “Flicker”.
RA8806 scan time of each COM line can be calculated by the formulas.
COM239
XCLK
RA8806 supports a special feature to reverse the Common and Segment signal. User could use
this feature to change the direction of cursor and display data. If use text rotate function and set
CDIR = 1, then use could show text in vertical display. Please refer to Section 6-10-4.
COM0
MISC
LP
Reg.
:
:
:
:
:
:
:
:
SEG0 .............................................. SEG319
1. Adjusting the Frame Rate.(By extending the scan time of each COM)
2. Avoiding the generation of “Flicker”.
Cursor Moving way
Bit_Num
Figure 6-14 : Example for Change Segment Direction
Bit 1
Bit 0
(1) SDIR = 0
ITCR
Define the order of Segment signals. (SDIR)
Define the order of Common signals. (CDIR)
Figure 6-15 : Idle Time Period
Table 6-7
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Description
T_COM
COM239
Two Layers Character/Graphic LCD Controller
COM0
:
:
:
:
:
:
:
:
SEG0 …………………………………. SEG319
COM_SCAN
(2) SDIR = 1
Cursor Moving way
Reference
REG[01h]
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RA8806