PXD10RM Datasheet, PDF (732/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

I²C
Registers
Interrupt
bus_clock
Clock
Control
Start
Stop
Arbitration
Control
In/Out
Data
Shift
Register
SCL
SDA
Address
Compare
Figure 20-1. I²C block diagram
20.2 Modes of operation
The I²C module has the following modes of operation:
• Run mode: This is the basic mode of operation.
• Stop mode: This is the lowest power saving mode and allows the system to turn of all the clocks to
the I²C module. This state can only be entered when there are no active transfers on the bus.
20.3 External signal description
20.3.1 Overview
The Inter-Integrated Circuit (I²C) module has 2 external pins.
20.3.2 Detailed signal descriptions
20.3.2.1 SCL
This is the bidirectional Serial Clock Line (SCL) of the module, compatible with the I²C-Bus specification.
20.3.2.2 SDA
This is the bidirectional Serial Data line (SDA) of the module, compatible with the I²C-Bus specification.
20-2
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor