AMIS-30623 LIN Microstepping Motordriver
Data Sheet
16.0 Lin Controller
16.1 General Description
The LIN (local interconnect network) is a serial communications protocol that efficiently supports the control of mechatronic nodes in
distributed automotive applications. The interface implemented in the AMIS-30623 is compliant with the LIN rev. 1.3 specifications. It
features a slave node, thus allowing for:
• single-master / multiple-slave communication
• self synchronization without quartz or ceramics resonator in the slave nodes
• guaranteed latency times for signal transmission
• single-wire communication
• transmission speed of 19.2 kbit/s
• selectable length of Message Frame: 2, 4, and 8 bytes
• configuration flexibility
• data checksum security and error detection;
• detection of defective nodes in the network.
It includes the analog physical layer and the digital protocol handler.
The analog circuitry implements a low side driver with a pull-up resistor as a transmitter, and a resistive divider with a comparator as a
receiver. The specification of the line driver/receiver follows the ISO 9141 standard with some enhancements regarding the EMI
behavior.
VBB
RxD
LIN
protocol
handler
to
control
block
Filter
LIN
TxD
Slope
Control
LIN address
HW0
HW1
HW2
from OTP
PC20051124.1
Figure 25:LIN Interface
16.2 Slave Operational Range for Proper Self Synchronization
The LIN interface will synchronize properly in the following conditions:
• Vbb ≥ 8 V
• Ground shift between master node and slave node < ±1V
It is highly recommended to use the same type of reverse battery voltage protection diode for the Master and the Slave nodes.
AMI Semiconductor – June 2006, Rev 3.0
42
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