User Manual

TMC5031-EVAL Manual / Firmware V1.00 (Rev. 1.00 / 2013-FEB-22) 8
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3.1.2.8 SPI and Interrupts (Measurement Points and Retrofit Option)
The SPI connector is not assembled, but can be retrofitted in case an external microcontroller should be
used. Typically, these pins are used for measurements concerning SPI interface and interrupts (INT and
PP).
Figure 3.3 Example for SPI connector assembly (header 2x5)
Pin
Label
Description
1
GND
System and module ground
2
GND
System and module ground
3
CLK
CLK input
4
PP
Tristate position compare output for motor 1 of the TMC5031
5
CS
Chip select input of SPI interface
6
INT
Tristate interrupt output based on ramp generator flags 4, 5, 6 & 7.
7
SCK
Serial clock input of SPI interface
8
SPI_MISO
Serial data input
9
DRV_ENN
Enable (not) input for drivers (tie to GND). Switches off all motor outputs (set high
for disable).
10
SPI_MOSI
Serial data output
Table 3.9 SPI and interrupt signals for measurements or connection of external device
3.1.2.8.1 Connecting an External Microcontroller
To enable communication via SPI for connecting an external microcontroller, it is necessary to first
solder a 0Ω resistor on the board. A 3V3 supply (VCCIO) for the external microcontroller is available.
Solder 0Ω resistor here.
Figure 3.4 Retrofit option: SPI