mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 179

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

14.1 Contents
14.2 Introduction
MC68HC908BD48
Freescale Semiconductor
Data Sheet — MC68HC908BD48
—
Rev. 2.1
Section 14. Multi-Master IIC Interface (MMIIC)
14.2
14.3
14.4
14.5
14.5.1
14.5.2
14.5.3
14.5.4
14.5.5
14.5.6
14.6
This Multi-master IIC (MMIIC) Interface is designed for internal serial
communication between the MCU and other IIC devices. A hardware
circuit generates "start" and "stop" signal, while byte by byte data
transfer is interrupt driven by the software algorithm. Therefore, it can
greatly help the software in dealing with other devices to have higher
system efficiency in a typical digital monitor system.
This module not only can be applied in internal communications, but can
also be used as a typical command reception serial bus for factory setup
and alignment purposes. It also provides the flexibility of hooking
additional devices to an existing system for future expansion without
adding extra hardware.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .181
Programming Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 190
I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Multi-Master IIC Address Register (MMADR) . . . . . . . . . . 182
Multi-Master IIC Control Register (MMCR) . . . . . . . . . . . . 183
Multi-Master IIC Master Control Register (MIMCR) . . . . . . 184
Multi-Master IIC Status Register (MMSR) . . . . . . . . . . . . . 186
Multi-Master IIC Data Transmit Register (MMDTR) . . . . . . 188
Multi-Master IIC Data Receive Register (MMDRR) . . . . . . 189
Multi-Master IIC Interface (MMIIC)
Data Sheet
179