TMC8462 Datasheet • Document Revision V1.4 • 2018-May -09
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Single Supply Operation TMC8462 is designed to work with a single external power supply rail. All
required supply voltages are generated internally. The required external supply rail depends on the
application scenario (between 3.3V and 24V).
3.5 Interfaces
Field Bus Interface TMC8462 contains 2 integrated 100-Mbit Ethernet PHYs and directly connects to the
field bus using an external transformer circuit. In addition, the PHY interfaces of two TMC8462 devices can
also be connected directly to allow back-to-back connection with only low part count and a small circuit.
This is useful when extending the EtherCAT bus on the board or to a another slave close by.
ESC Process Data Interface The ESC part can be accessed via the so-called Process Data Interface (PDI).
TMC8462 comes with an SPI PDI. Besides the standard SPI bus lines additional control signals belong to
the SPI PDI, which are further described in Section 5.1..
MFC IO Control Interface The MFC IO block of TMC8462 can be accessed from EtherCAT master side
or from the local application controller. For connection to the local application controller, a second SPI
interface – the MFC IO SPI – is provided. The protocol used nearly identical to the SPI PDI interface.
Additional information on the MFC IO SPI is given in Section 5.2.
EEPROM Interface The EEPROM interface is intended to be a point-to-point interface between TMC8462
and EEPROM with TMC8462 being the master. If other I2C masters are required to access the I2C bus,
TMC8462 must be held in reset state, for example for in-circuit-programming of the EEPROM. During
operation, the application controller must tristate its I2C interface. Depending on the EEPROM size the
addressing mode must be properly set using the PROM_SIZE configuration pin.
Configuration Inputs Hard-wired configuration pins are available at the TMC8462, which are used to
configure various options related to the hardware configuration and application scenario and which will
not change. These pins are PROM_SIZE, PDI_SHARED_SPI_BUS, and DEVICE_EMULATION.
More information on these configuration pins and signals is given in Section 4.2 and Section 5.
3.6 Software- and Tool-Support
TRINAMIC’s EtherCAT Slave Controller family comes with extensive hardware and software tool support to
get started quickly.
Evaluation Board An evaluation board is available for the TMC8462 with standard RJ45 connectors and
transformers for interfacing twisted pair copper (TPC) media.
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