Datasheet

TMC8462 Datasheet • Document Revision V1.5 • 2019-June-21

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TMC8462 pin Description Typical pin on a MCU

PDI_EOF Indicates end of an Ethernet/EtherCAT frame General purpose Input

PDI_WDSTATE 0: Watchdog expired; 1: Watchdog not expired General purpose Input

PDI_WDTRIGGER Watchdog triggered if ’1’ General purpose Input

Table 3: PDI signal description

5.1.1 SPI protocol description

Each SPI datagram contains a 2- or 3-byte address/command part and a data part. For addresses below

0x2000

, the 2-byte addressing mode can be used, the 3 byte addressing mode can be used for all addresses.

C2 C1 C0 Command

0 0 0 NOP (no operation, no following data bytes)

0 0 1 Reserved

0 1 0 Read

0 1 1 Read with wait state byte

1 0 0 Write

1 0 1 Reserved

1 1 0 Address extension, signaling 3 byte mode

1 1 1 Reserved

Table 4: PDI SPI commands

A12 A11 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0A10 C2 C1 C0

Address Command

A12 A11 A9 A8 A7 A6 A5A10 A4 A3 A2 A1 A0 C2 C1 C0

Byte 0 Byte 1

Figure 9: PDI SPI 2 byte addressing

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