mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 905

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.13 THE I
The inter-integrated circuits (I
number of other I
A/D converters, and LCD displays. The I
is used to connect several integrated circuits on a board. It uses two wires—serial data
(SDA) and serial clock (SCL)—to carry information between the integrated circuits that are
connected to it.
The I
generator, and a control unit. The transmitter and receiver sections use the same clock, that
is derived from the I
slave mode. According to the I
if the SCL signal is held low by a slave device. As a master in the middle of a data transfer,
the I
does not begin counting down from a specific timeout value when SCL is asserted, so the
software must monitor SCL assertion times for bus timeout.
The I
FIFO size of 2 characters. The MPC823 I
not enabled in the I2MOD register, it consumes very little power.
2
2
C controller recognizes wait states by monitoring the SCL signal. The I
2
C controller consists of transmitter and receiver sections, an independent baud rate
C receiver and transmitter are double-buffered, which corresponds to an effective
2
C CONTROLLER
2
C devices, such as microcontrollers, EEPROMs, real-time clock devices,
2
RX DATA REGISTER
C baud rate generator in master mode and generated externally in
SHIFT REGISTER
Figure 16-124. I
Freescale Semiconductor, Inc.
For More Information On This Product,
2
2
C
C specification, wait states are inserted during a data transfer
MPC823 REFERENCE MANUAL
®
PERIPHERAL BUS
) controller enables the MPC823 to exchange data with a
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CONTROL
2
C Controller Block Diagram
2
TX DATA REGISTER
C controller is a synchronous, multimaster bus that
SHIFT REGISTER
2
C bit 0 (MSB) is shifted out first. When the I
BRG
Communication Processor Module
MODE REGISTER
U-BUS
SCL
SDA
2
C controller
16-453
2
C is