PCF8566T Просмотр технического описания (PDF) - NXP Semiconductors.

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PCF8566T

Universal LCD driver for low multiplex rates

NXP Semiconductors. 

NXP Semiconductors

PCF8566

Universal LCD driver for low multiplex rates

Table 3. Pin description …continued

Symbol

Pin

Description

BP0

13

LCD backplane outputs

BP2

14

BP1

15

BP3

16

S0 to S23

17 to 40 LCD segment outputs

[1] The substrate (rear side of the die) is wired to VDD but should not be electrically connected.

7. Functional description

The PCF8566 is a versatile peripheral device designed to interface any

microprocessor or microcontroller to a wide variety of LCDs. It can directly drive any static

or multiplexed LCD containing up to 4 backplanes and up to 24 segments.

The display configurations possible with the PCF8566 depend on the number of active

backplane outputs required. Display configuration selection is shown in Table 4. All of the

display configurations given in Table 4 can be implemented in the typical system shown in

Figure 4.

The host microprocessor or microcontroller maintains the 2-line I2C-bus communication

channel with the PCF8566.

Biasing voltages for the multiplexed LCD waveforms are generated internally, removing

the need for an external bias generator. The internal oscillator is selected by connecting

pin OSC to VSS. The only other connections required to complete the system are the

power supplies (pins VDD, VSS and VLCD) and the LCD panel selected for the application.

Table 4. Display configurations

Backplanes Elements 7-segment numeric

Digits

Indicator

symbols

4

96

12

12

3

72

9

9

2

48

6

6

1

24

3

3

14-segment numeric

Characters Indicator

symbols

6

12

4

16

3

6

1

10

Dot matrix

96 (4 × 24)

72 (3 × 24)

48 (2 × 24)

24

PCF8566_7

Product data sheet

Rev. 07 — 25 February 2009

© NXP B.V. 2009. All rights reserved.

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