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PCF21219DUGR 데이터시트(PDF) 72 Page - NXP Semiconductors

부품명 PCF21219DUGR
상세설명  Automotive LCD driver for character displays
PDF  107 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF21219DUGR 데이터시트(HTML) 72 Page - NXP Semiconductors

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PCA2117
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 4 — 8 April 2015
72 of 107
NXP Semiconductors
PCA2117
Automotive LCD driver for character displays
9.3.1 SPI-bus data transfer
The chip enable signal is used to identify the transmitted data. Each data transfer is a
byte, with the MSB sent first.
The transmission is controlled by the active LOW chip enable signal CE. The first byte
transmitted is the subaddress byte.
The subaddress byte opens the communication with a read/write bit and a subaddress.
The subaddress is used to identify multiple devices on one SPI bus.
After the subaddress byte, a control byte follows (see Section 9.1). The purpose of this
byte is to indicate the content for the following data bytes (RAM, command or control
byte).
In this way, it is possible to send a mixture of RAM and command data in one access or
alternatively, to send just one type of data in one access.
Fig 50. SPI data transfer overview
Table 46.
Subaddress byte definition
Bit
Symbol
Value
Description
7R/W
data read or write selection
0
write data
1
read data
6to5
SA
01
Subaddress; other codes cause the device to
ignore data transfer
4to0
-
unused



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