參數資料
型號： PCF8578T
廠商： NXP Semiconductors N.V.
元件分類： LCD驅動器
英文描述： LCD row-column driver for dot matrix graphic displays
封裝： PCF8578HT/1<SOT357-1 (TQFP64)|<<http://www.nxp.com/packages/SOT357-1.html<1<Always Pb-free,;PCF8578T/1<SOT190-1 (VSO56)|<<http://www.nxp.com/packages/SOT190-1.html<1&l
文件頁數： 11/46頁
文件大?。?/td> 274K
代理商： PCF8578T
PCF8578_6
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 06 — 5 May 2009
19 of 46
NXP Semiconductors
PCF8578
LCD row/column driver for dot matrix graphic displays
8.8.5 I2C-bus controller
The I2C-bus controller detects the I2C-bus protocol, slave address, commands and display
data bytes. It performs the conversion of the data input (serial-to-parallel) and the data
output (parallel-to-serial). The PCF8578 acts as an I2C-bus slave transmitter/receiver in
mixed mode, and as a slave receiver in row mode. A slave device cannot control bus
communication.
8.8.6 Input lters
To enhance noise immunity in electrically adverse environments, RC low-pass lters are
provided on the SDA and SCL lines.
8.8.7 I2C-bus protocol
Two 7-bit slave addresses (0111 100 and 0111 101) are reserved for both the PCF8578
and PCF8579. The least signicant bit of the slave address is set by connecting input SA0
to either logic 0 (VSS) or logic 1 (VDD). Therefore, two types of PCF8578 or PCF8579 can
be distinguished on the same I2C-bus which allows:
1. One PCF8578 to operate with up to 32 PCF8579s on the same I2C-bus for very large
applications.
2. The use of two types of LCD multiplex schemes on the same I2C-bus.
In most applications the PCF8578 will have the same slave address as the PCF8579.
The I2C-bus protocol is shown in Figure 15. All communications are initiated with a START
condition (S) from the I2C-bus master, which is followed by the desired slave address and
read/write bit. All devices with this slave address acknowledge in parallel. All other devices
ignore the bus transfer.
In WRITE mode (indicated by setting the read/write bit LOW) one or more commands
follow the slave address acknowledgement. The commands are also acknowledged by all
addressed devices on the bus. The last command must clear the continuation bit C.
After the last command a series of data bytes may follow. The acknowledgement after
each byte is made only by the (A0, A1, A2 and A3) addressed PCF8579 or PCF8578 with
its implicit subaddress 0. After the last data byte has been acknowledged, the I2C-bus
master issues a STOP condition (P).
The general characteristics and detailed specication of the I2C-bus are available on request.
Fig 14. Acknowledgement on the I2C-bus
mba606
START
condition
S
SCL FROM
MASTER
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
clock pulse for
acknowledgement
1
2
8
9
相關PDF資料
PDF描述
PCI-36RS-SB-L STRAIGHT TELECOM AND DATACOM CONNECTOR
PCI-36SS-SB-N STRAIGHT TELECOM AND DATACOM CONNECTOR
PCI-36SS-B-H STRAIGHT TELECOM AND DATACOM CONNECTOR
PCI-50R-B-LT RIGHT ANGLE TELECOM AND DATACOM CONNECTOR
PCI-50S-B-UT RIGHT ANGLE TELECOM AND DATACOM CONNECTOR
相關代理商/技術參數
參數描述
PCF8578T/1 制造商:NXP Semiconductors 功能描述:IC LCD DRIVER ROW/COLUMN 56VSOP 制造商:NXP Semiconductors 功能描述:IC, LCD DRIVER, ROW/COLUMN, 56VSOP
PCF8578T/1,112 功能描述:LCD 驅動器 LCD DRVR DOT MATRIX RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
PCF8578T/1,118 功能描述:LCD 驅動器 DOT MATRIX LCD DRIVER (R/COLM) RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
PCF8578T/1112 制造商:NXP Semiconductors 功能描述:IC LCD DRVR 6V VSOP-56
PCF8578TD 功能描述:LCD 驅動器 LCD DRVR DOT MATRIX RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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