TMC8462 Datasheet • Document Revision V1.4 • 2018-May -09
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TMC8462 pin
PDI_EOF
Description
Typical pin on a MCU
Indicates end of an Ethernet/EtherCAT frame
0: Watchdog expired; 1: Watchdog not expired
Watchdog triggered if ’1’
General purpose Input
General purpose Input
General purpose Input
PDI_WDSTATE
PDI_WDTRIGGER
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
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
NOP (no operation, no following data bytes)
Reserved
Read
Read with wait state byte
Write
Reserved
Address extension, signaling 3 byte mode
Reserved
Table 4: PDI SPI commands
Address
Command
A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
C2 C1 C0
A12 A11 A10 A9 A8 A7 A6 A5
A4 A3 A2 A1 A0 C2 C1 C0
Byte 0
Byte 1
Figure 9: PDI SPI 2 byte addressing
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