“We expect EtherCAT to gain relevance in the embedded automation domain, where tight space constraints drive miniaturization,” explains Michael Randt, Founder and CEO of Trinamic. “To fulfill this requirement, we designed the TMC8461 and TMC8462 as what we call a ‘U-Chip’, that encompasses all components in an embedded EtherCAT slave except for the microcontroller itself, as developers tend to stick with the microcontrollers and programming tool-chains.“Extending the feature set of EtherCAT’s core technology, the slave controllers come with a broad array of peripherals and features: an integrated smart-peripherals block accessible from an MCU or EtherCAT master and, in addition to the PWM unit and Step/Dir interface, an SPI master and encoder interface that can be directly mapped to the PDO (Process Data Object) by the memory manager. This unique SPI interface enables latency-free read from an ADC or encoder or write to a DAC.
The ICs include a standalone mode that enables direct mapping of integrated peripherals to bus registers, while in parallel an external MCU can perform higher layer protocol operations. To ensure wide interoperability, the TMC8461 and TMC8462 communication hardware has been verified as 100% compatible with the existing Beckhoff EtherCAT slave controller through extensive interoperability testing.
Like all devices by Trinamic, the ICs benefit from the company’s comprehensive development eco-system called “Landungsbrücke”. This includes evaluation boards, reference designs and, for this new device, sample EtherCAT software stacks for Cortex MCUs. All configuration and parameterization tools are incorporated into Trinamic’s Integrated Development Environment. The device can be used with any MCU that comes with an SPI interface, or standalone in SPI emulation mode.
The TMC8461-BA is priced at USD 7.31 in 1K unit volumes and comes in a BGA144 (10x10) package. The TMC8462-BA convinces with the small BGA121 (9x9) package and is priced at USD 9.31 in 1K unit volumes. The components are available for shipment from May 2018 and will be followed by the evaluation boards TMC8461-EVAL and TMC8462-EVAL and the breakout board TMC8462-BOB soon. The devices meet the -40°C to 125°C automotive grade temperature specification.
Features and benefits:
- Standard compliant EtherCAT slave controller
- 8 High Voltage I/Os (up to 35V, 100mA)
- 2x switching regulator for system supply
- Multifunction block comprises Watchdog, 4 PWM outputs and Step/Dir generator
- TMC8461: 2 MII Interfaces for external Ethernet PHY
- TMC8462: 2 integrated 100Mbit Ethernet PHYs