AMIS-30624 AMI Semiconductor, Inc., AMIS-30624 Datasheet - Page 39

• Manufacturer Part Number: AMIS-30624
• Description: I2c Microstepping Motordriver
• Manufacturer: AMI Semiconductor, Inc.

AMIS-30624 I
16.0 I
16.1 General Description
AMIS-30624 uses a simple bi-directional 2-wire bus for efficient inter-ic control. This bus is called the Inter IC or I
Features include:
16.2 Concept
The I
bus. Each device connected to the bus is recognized by a unique address and operates as either a transmitter or receiver, depending
on the function of the device. AMIS-30624 can both receive and transmit data. In addition to transmitters and receivers, devices can
also be considered as masters or slaves when performing data transfers. AMIS-30624 is a slave device. See Table 30.
Table 29: Definition of I
Transmitter
Receiver
Master
Slave
Synchronization
Figure 23 highlights the master-slave and receiver-transmitter relationships to be found on the I
relationships are not permanent but only depend on the direction of data transfer at that time. The transfer of data would proceed as
follows:
1) Suppose the microcontroller wants to send information to motordriver_1:
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
2
C-bus consists of two wires, serial data (SDA) and serial clock (SCK), carrying information between the devices connected on the
• Only two bus lines are required; a serial data line (SDA) and a serial clock line (SCK).
• Each device connected to the bus is software addressable by a unique address and simple master/slave relationships exists at
• Serial, 8-bit oriented, bi-directional data transfers can be made up to 400 kbit/s.
• On-chip filtering rejects spikes on the bus data line to preserve data integrity.
• No need to design bus interfaces because I
• IC’s can be added to or removed from a system without affecting any other circuits on the bus.
• Microcontroller (master) addresses motordriver_1 (slave)
• Microcontroller (master-transmitter) sends data to motordriver_1 (slave-receiver)
• Microcontroller terminates the transfer
2
all times; master can operate as master-transmitter or as master receiver.
C Bus Description
Term
2
C –bus Terminology
SDA
SCL
The device which sends data on the bus
The device which receives data from the bus
The device which initiates a transfer, generates clock signals and terminates a transfer
The devices addressed by a master
Procedure to synchronizer the clock signals of two or more devices
2
C Microstepping Motordriver
Figure 23: Example of an I
controller
Micro-
Motordriver_1
AMIS-30624
2
2
C-bus Configuration Using One Microcontroller and Four Slaves
C-bus interface is already integrated on-chip.
Motordriver_2
AMIS-30624
39
Description
Motordriver_3
AMIS-30624
Motordriver_4
AMIS-30624
2
C-bus. It should be noted that these
PC20070217.1
2
C-bus.
Data Sheet