TMP86FS23UG datasheet(173/252 Pages) TOSHIBA

173 / 252 page

Page 161

TMP86FS23UG

15. LCD Driver

The TMP86FS23UG has a driver and control circuit to directly drive the liquid crystal device (LCD). The pins to

be connected to LCD are as follows:

1. Segment output port

32 pins

(SEG31 to SEG0)

2. Common output port

4 pins

(COM3 to COM0)

In addition, VLC pin is provided for the LCD power supply.

The devices that can be directly driven is selectable from LCD of the following drive methods:

1. 1/4 Duty (1/3 Bias) LCD

Max 128 Segments (8 segments

× 16 digits)

2. 1/3 Duty (1/3 Bias) LCD

Max 96 Segments (8 segments

× 12 digits)

3. 1/3 Duty (1/2 Bias) LCD

Max 96 Segments (8 segments

× 12 digits)

4. 1/2 Duty (1/2 Bias) LCD

Max 64 Segments (8 segments

× 8 digits)

5. Static LCD

Max 32 Segments (8 segments

× 4 digits)

15.1 Configuration

Figure 15-1 LCD Driver

COM3

COM0

VLC

Duty

control

fc/217, fs/29

fc/214

fc/216, fs/28

Common driver

DBR

display data area

Display data select control

Timing

control

Display data buffer register

Blanking

control

Segment driver

fc/215

LCDCR

DUTY

SLF

EDSP

LRSE

Power Switch and

Bias, Bleeder

resistance

SEG0

SEG31

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