Chapter 28 i2c interface, 1 introduction, 1 block diagram – Freescale Semiconductor MCF5480 User Manual
Page 855: Introduction -1, Block diagram -1, Chapter 28, “i2c interface, Chapter 28, “i2c, Interface, Chapter 28 i, C interface
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
28-1
Chapter 28
I
2
C Interface
28.1
Introduction
This chapter describes the I
2
C™ module, including I
2
C protocol, clock synchronization, and I
2
C
programming model registers. It also provides extensive programming examples.
28.1.1
Block Diagram
A block diagram of the I
2
C module is shown in
Figure 28-1. I
2
C Block Diagram
Address
Compare
In/Out
Data
Shift
Start, Stop,
Input
Sync
Clock
Control
Registers and ColdFire Interface
Address Decode
I
2
C Address
Data MUX
SDA
SCL
Address
IRQ
Data
and
Arbitration
Control
Register
Internal Bus
Register
(I2ADR)
I
2
C Frequency
Divider Register
(I2FDR)
I
2
C Data
I/O Register
(I2DR)
I
2
C Status
Register
(I2SR)
I
2
C Control
Register
(I2CR)
Functional
Module