p89lpc9401 NXP Semiconductors, p89lpc9401 Datasheet - Page 29

• Manufacturer Part Number: p89lpc9401
• Description: 8-bit Microcontroller With Accelerated Two-clock 80c51 Core 8 Kb 3 V Byte-erasable Flash With 32 Segment X 4 Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
P89LPC9401_1
Preliminary data sheet
7.20 I
The I
connected to the bus, and it has the following features:
A typical I
byte-oriented I
2
Fig 9. I
•
•
•
•
•
•
C-bus serial interface
Bidirectional data transfer between masters and slaves
Multi master bus (no central master)
Arbitration between simultaneously transmitting masters without corruption of serial
data on the bus
Serial clock synchronization allows devices with different bit rates to communicate via
one serial bus
Serial clock synchronization can be used as a handshake mechanism to suspend and
resume serial transfer
The I
2
C-bus uses two wires (SDA and SCL) to transfer information between devices
2
2
2
C-bus configuration
C-bus may be used for test and diagnostic purposes.
C-bus configuration is shown in
I
2
2
C-bus
8-bit two-clock 80C51 microcontroller with 32 segment
C-bus interface that supports data transfers up to 400 kHz.
P1.3/SDA
Rev. 01 — 5 September 2005
P89LPC9401
P1.2/SCL
OTHER DEVICE
WITH I
R P
Figure
INTERFACE
2
C-BUS
9. The P89LPC9401 device provides a
R P
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
OTHER DEVICE
WITH I
INTERFACE
P89LPC9401
2
C-BUS
002aab465
SDA
SCL
4 LCD driver
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