UPD78064YGF-XXX-3BA(1992) データシートの表示（PDF） - NEC => Renesas Technology

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UPD78064YGF-XXX-3BA
(Rev.:1992)

8-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

mPD78062Y,78063Y,78064Y

5.8 LCD CONTROLLER/DRIVER

An LCD controller/driver with the following functions is incorporated.

Ý Selection of 5 types of display mode

Ý 16 of the segment signal of outputs can be switched to input/output ports in units of 2.

(P80 /S39 to P87/S32, P90/S31 to P97/S24)

Table 5-4 Display Mode Types and Maximum Number of Display Pixels

Bias Method

——

1/2

1/3

Time Multiplexing

Static

2

3

3

4

Common Signal Used

COM0 (COM1 to COM3)

COM0, COM1

COM0 to COM2

COM0 to COM2

COM0 to COM3

Maximum Number of Display Pixels

40 (40 segments ¥ 1 common)

80 (40 segments ¥ 2 commons)

120 (40 segments ¥ 3 commons)

160 (40 segments ¥ 4 commons)

4

Fig. 5-11 LCD Controller/Driver Block Diagram

H

Internal Bus

Display

Data Memory

Segment

Data Selector

Port

Output Data

Segment Driver

Prescaler

fW

26

fW

fW

fW

29

28

27

Timing Controller

LCDCL

Selector

Common Driver

LCD Drive Voltage

Generator

S0 S23 S24/P97

S39/P80

COM0 COM1 COM2 COM3

VLC2 VLC1 VLC0 BIAS

25

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