pcf85162 NXP Semiconductors, pcf85162 Datasheet - Page 19

• Manufacturer Part Number: pcf85162
• Description: Universal Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF85162_1
Product data sheet
7.16.3 System configuration
7.16.4 Acknowledge
A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the STOP
condition (P) (see
A device which sends data to the bus is a transmitter, a device which receives data from
the bus is a receiver. The device which initiates and terminates a transfer is the master;
and the devices which are addressed by the master are the slaves (see
The number of data bytes transferred between the START and STOP conditions from
transmitter to receiver is unlimited. Each byte of eight bits is followed by an acknowledge
cycle.
Acknowledgement on the I
Fig 12. Definition of START and STOP conditions
Fig 13. System configuration
•
•
•
•
A slave receiver, which is addressed, must generate an acknowledge after the
reception of each byte.
A master receiver must generate an acknowledge after the reception of each byte that
has been clocked out of the slave transmitter.
The device that acknowledges must pull-down the SDA line during the acknowledge
clock pulse, so that the SDA line is stable LOW during the HIGH period of the
acknowledge related clock pulse (set-up and hold times must be taken into
consideration).
A master receiver must signal an end of data to the transmitter by not generating an
acknowledge on the last byte that has been clocked out of the slave. In this event, the
transmitter must leave the data line HIGH to enable the master to generate a STOP
condition.
SCL
SDA
SDA
SCL
TRANSMITTER/
RECEIVER
MASTER
START condition
Figure
S
Rev. 01 — 7 January 2010
12).
RECEIVER
2
C-bus is illustrated in
SLAVE
TRANSMITTER/
RECEIVER
Universal LCD driver for low multiplex rates
SLAVE
Figure
TRANSMITTER
14.
MASTER
STOP condition
P
PCF85162
TRANSMITTER/
© NXP B.V. 2010. All rights reserved.
Figure
RECEIVER
MASTER
mbc622
13).
mga807
SDA
SCL
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