Blink Function - Renesas F-ZTAT H8 Series Hardware Manual

13. Dot Matrix LCD Controller (H8/3857 Group)
13.3.8

Blink Function

Dot Matrix Display Blinking
The LCD controller can perform blinking display in any area. With an 80 Hz frame frequency, the
display goes on and off in a cycle of approximately 1.6 seconds.
To set a blink area, in the horizontal direction the line unit is specified by means of the blink start
line register (LR8) and blink end line register (LR9), while in the vertical direction a 5-bit unit
(SOB = 0) or 8-bit unit (SOB = 1) is set in the blink register (LR6). When 1 is set in the blink
register (LR6), blinking of the corresponding dot is controlled. After making these register
settings, blinking is started by setting the BLK bit in control register 2 (LR1) to 1. As the blink
area is designated by an absolute specification with respect to the display memory, if the display is
scrolled the blink area also shifts accordingly.
Blink start line
register (LR8)
Blink end line
register (LR9)
SOB = 0
SOB = 1
Blink register (LR6)
Figure 13.10 Blink Register (LR6) and Blink Locations
Rev.3.00 Jul. 19, 2007 page 358 of 532
REJ09B0397-0300
SEG1 SEG6 SEG11 SEG16 SEG21 SEG26 SEG31 SEG36
SEG1 SEG9 SEG17 SEG25
1 1 1 0 0 1
DB0
(LSB)
LCD
SEG33 SEG41 SEG49 SEG57
1 0
DB7
(MSB)
Blink area