4524_M Datasheet, PDF (233/310 Pages) Renesas Technology Corp – 4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES

4524 Group
APPLICATION
2.6 LCD function
2.6.3 LCD application examples
(1) LCD display
LCD display function can be used to display 80 pixels (maximum 4 common ✕ 20 segment).
Outline: LCD can be displayed easily by using the LCD display function.
Specifications: 1/4 duty and 1/3 bias LCD is displayed by using LCD display panel example. Bit 4
of timer 5 is used for the LCD clock source, the sub-clock f(XCIN) = 32.768 kHz is
used for the timer 5 clock source, and the frame frequency is set to 85.3 Hz.
Figure 2.6.3 shows the LCD display panel example, Figure 2.6.4 shows the segment assignment example,
Figure 2.6.5 shows the LCD RAM assignment example, and Table 2.6.6 shows the initial setting example.
Every
Program Su. Mo. Tu. We. Th. Fr. Sa. _weeks SP EP
Start Stop
A.M.
BS
P.M.
Fig. 2.6.3 LCD display panel example
CH
Every
Program _{Su. Mo. Tu. We. Th. Fr. Sa. weeks SP EP}
Start Stop
A.M.
BS
P.M.
➀➁➂➃➄➅➆➇
Fig. 2.6.4 Segment assignment example
CH
Z
1
X
0
1
Y
Bit ₃
2
1
0
3
2
1
8
➀-g _➀-e ➀-d ➀-c _Start ➀-f ➀-b
9
➁-g _➁-e ➁-d ➁-c _Stop ➁-f ➁-b
10
➂-g _➂-f ➂-d ➂-c
•
•
➂-f ➂-b
11
➃-g _➃-e ➃-d ➃-c _Unused ➃-f ➃-b
12
➄-g _➄-e ➄-d ➄-c
•
•
➄-f ➄-b
13
➅-g _➅-e ➅-d ➅-c _Unused ➅-f ➅-b
14
➆-g _➆-e ➆-d ➆-c _Unused ➆-f ➆-b
15
➇-g _➇-e ➇-d ➇-c _Unused ➇-f ➇-b
0
3
➀-a We.
➁-a
➂-a
Every
weeks
BS
➃-a
➄-a
➅-a
➆-a
➇-a
2
2
1
0
Tu. Mo. Su.
Sa. Fr. Tu.
CH EP SP
P.M. A.M. Program
COM COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
Note: LCD display RAM is not assigned.
Fig. 2.6.5 LCD RAM assignment example
Rev.2.00 Aug, 06 2004
REJ09B0107-0200Z
a
f
g
b
e
c
d
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