PCF8531U datasheet(35/44 Pages) NXP

tên linh kiện	PCF8531U

Giải thích chi tiết về linh kiện	34 x 128 pixel matrix driver

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35 / 44 page

PCF8531_4

Product data sheet

Rev. 04 — 13 June 2008

35 of 44

NXP Semiconductors

PCF8531

34 x 128 pixel matrix driver

15. Application information

15.1 Typical system conﬁguration

The host microprocessor/microcontroller and the PCF8531 are both connected to the

I2C-bus. The SDA and SCL lines must be connected to the positive power supply via

pull-up resistors. The internal oscillator requires no external components. The appropriate

intermediate biasing voltage for the multiplexed LCD waveforms are generated on-chip.

The only other connections required to complete the system are to the power supplies

(VDD, VSS and VLCD) and suitable capacitors for decoupling VLCD and VDD.

Fig 28. Typical system conﬁguration

mgs483

HOST

MICROPROCESSOR/

MICROCONTROLLER

LCD PANEL

VSS1,

VSS2

VSS

VDD(I2C)

VLCD

VDD1 to VDD3

VSS1, VSS2

SDA

SCL

PCF8531

Rpu

RES

128 column drivers

34 row drivers

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