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PCF8534AU/DA/1 датащи(PDF) 22 Page - NXP Semiconductors

номер детали PCF8534AU/DA/1
подробное описание детали  Universal LCD driver for low multiplex rates
PDF  47 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8534AU/DA/1 датащи(HTML) 22 Page - NXP Semiconductors

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PCF8534A_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 6 August 2009
22 of 47
NXP Semiconductors
PCF8534A
Universal LCD driver for low multiplex rates
8.1.1.1
START and STOP conditions
Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW change
of the data line, while the clock is HIGH, is defined as the START condition (S).
A LOW-to-HIGH change of the data line, while the clock is HIGH, is defined as the STOP
condition (P). The START and STOP conditions are illustrated in Figure 14.
8.1.2 System configuration
A device generating a message is a ‘transmitter’ and a device receiving a message is the
‘receiver’. The device that controls the message is the ‘master’ and the devices which are
controlled by the master are the ‘slaves’. The system configuration is illustrated in
Figure 15.
Fig 13. Bit transfer
mba607
data line
stable;
data valid
change
of data
allowed
SDA
SCL
Fig 14. Definition of START and STOP conditions
mbc622
SDA
SCL
P
STOP condition
SDA
SCL
S
START condition
Fig 15. System configuration
mga807
SDA
SCL
MASTER
TRANSMITTER/
RECEIVER
MASTER
TRANSMITTER
SLAVE
TRANSMITTER/
RECEIVER
SLAVE
RECEIVER
MASTER
TRANSMITTER/
RECEIVER



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