TMC8462 Datasheet • Document Revision V1.4 • 2018-May -09
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3 Principles of Operation / Key Concepts
TMC8462 is a highly integrated ASIC providing the interface between the Ethernet-based EtherCAT real-time
field bus and the local application. Its extended digital and high voltage feature set provides additional
functions to the EtherCAT slave.
3.1 General Device Architecture
Figure 1 shows the general device architecture and major connections of TMC8462. The four function
blocks EtherCAT Slave Controller, Multi-Function Control and IO, Analog and High Voltage, and Ethernet
PHYs are introduced in the following sub-sections.
For operation, a stable 100MHz clock source, an IIC EEPROM, and power supply for IO and high voltage
operation are required (if the high voltage features are used). An application controller, which also runs
the EtherCAT slave stack, connects to the SPI interfaces. The application and onboard peripherals can be
controlled by the application controller or the Multi-Function Control and IO block.
Figure 1: General device architecture
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