UPD78F1502AGK-GAK-AX Datasheet, PDF (693/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 16 LCD CONTROLLER/DRIVER
Figure 16-11. Relationship Between LCD Display Data Memory Contents and Segment/Common Outputs
(78K0R/LH3)
(a) Static, 2-time-slice, 3-time-slice, and 4-time-slice
B-pattern area
A-pattern area
b7
b6
b5
b4
b3
b2
b1
b0
F0435H
SEG53
F0434H
SEG52
F0433H
SEG51
F0405H
F0404H
F0403H
F0402H
F0401H
F0400H
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
(b) 8-time-slice
b7
b6
b5
b4
b3
b2
b1
b0
F0435H
SEG53
F0434H
SEG52
F0433H
SEG51
F0405H
F0404H
F0403H
F0402H
F0401H
F0400H
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
Note
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM7 COM6 COM5 COM4 COM3 COM2 COM1 COM0
Note The COM4 to COM7 pins and SEG0 to SEG3 pins are used alternatively. To use the LCD display data memory
when the number of time slices is eight, the area of F0400H to F0403H can be used for a purpose other than
display, because it is not used for LCD display.
To use the LCD display data memory when the number of time slices is static, two, three, or four, the lower four bits
and higher four bits of each address of the LCD display data memory become an A-pattern area and a B-pattern area,
respectively.
The correspondences between A-pattern area data and COM signals are as follows: bit 0 ⇔ COM0, bit 1 ⇔ COM1,
bit 2 ⇔ COM2, and bit 3 ⇔ COM3.
The correspondences between B-pattern area data and COM signals are as follows: bit 4 ⇔ COM0, bit 5 ⇔ COM1,
bit 6 ⇔ COM2, and bit 7 ⇔ COM3.
A-pattern area data will be displayed on the LCD panel when BLON = LCDSEL = 0 has been selected, and B-pattern
area data will be displayed on the LCD panel when BLON = 0 and LCDSEL = 1 have been selected.
When BLON = 1 has been selected, A-pattern and B-pattern areas will be alternately displayed, according to the
constant-period interrupt (INTRTC) timing of the real-time counter (RTC).
R01UH0004EJ0501 Rev.5.01
677
Jun 20, 2011