mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 273

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Technical Data — MC68HC912DG128
15.1 Contents
15.2 Introduction
MC68HC912DG128 — Rev 3.0
MOTOROLA
15.2
15.3
15.4
15.5
15.6
15.7
The Inter-IC Bus (IIC or I
provides a simple, efficient method of data exchange between devices.
Being a two-wire device, the IIC minimizes the need for large numbers
of connections between devices, and eliminates the need for an address
decoder.
This bus is suitable for applications requiring occasional
communications over a short distance between a number of devices. It
also provides flexibility, allowing additional devices to be connected to
the bus for further expansion and system development.
The interface is designed to operate up to 100kbps with maximum bus
loading and timing. The device is capable of operating at higher baud
rates, up to a maximum of clock/20, with reduced bus loading. The
maximum communication length and the number of devices that can be
connected are limited by a maximum bus capacitance of 400pF.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
IIC Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
IIC System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
IIC Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
IIC Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
IIC Programming Examples . . . . . . . . . . . . . . . . . . . . . . . . . .290
Go to: www.freescale.com
Inter-IC Bus
2
C) is a two-wire, bidirectional serial bus that
Section 15. Inter-IC Bus
Technical Data
273