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PCF8545 Datasheet(PDF) 42 Page - NXP Semiconductors

Part # PCF8545
Description  Universal LCD driver for multiplex rates up to 1:8
PDF  68 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8545 Datasheet(HTML) 42 Page - NXP Semiconductors

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NXP Semiconductors
PCF8545
Universal LCD driver for multiplex rates up to 1:8
013aaa466
command byte
Bias sytem = 1/3 B[1:0] = 11
unused
R/W
SA
SCL
SDI
CE
b7
1
b6
0
b5
1
b4
0
b3
0
b2
0
b1
0
b0
0
b7
0
b6
0
b5
0
b4
0
b3
0
b2
0
b1
0
b0
0
b7
0
b6
0
b5
0
b4
0
b3
0
b2
1
b1
1
b0
1
In this example, the bias system is set to 1⁄3. The transfer is terminated by CE returning to logic 1. After the last bit is
transmitted, the state of the SDI line is not important.
Figure 34. SPI-bus example
9 Internal circuitry
A0, RESET,
OSCCLK
VDD
VSS
aaa-008328
BP0 to BP7,
S0 to S39
VLCD
VSS
VLCD, VDD,
SCL, SDA
VSS
Figure 35. Device protection diagram for PCF8545A
CE, RESET,
OSCCLK
VDD
VSS
BP0 to BP7,
S0 to S39
VLCD
VSS
SDI, SCL
VLCD,VDD
VSS
aaa-008329
Figure 36. Device protection diagram for PCF8545B
10 Safety notes
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Observe
precautions for handling electrostatic sensitive devices.
Such precautions are described in the ANSI/ESD S20.20, IEC/ST 61340-5,
JESD625-A or equivalent standards.
PCF8545
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 2 — 4 October 2021
42 / 68



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