Datasheet

Block Diagram

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2.3 Jumpers

This EVM has no jumpers that must be configured by the user.

2.4 Switches

Switch S1 offers EVM configurability by moving each individual switch, as listed in Table 1.

Table 1. Switch S1 Configurations

Switch Position Signal Name HI LO

1 USM0

Select Degrees of Microstepping

2 USM1

(only available on Indexer Mode)

3 USM2

4 Not Used Not Used

5 nRESET DRV882x nRESET Pin (Reset Mode when LO)

6 nSLEEP DRV882x nSLEEP Pin (Sleep Mode when LO)

7 MCU MODE MCU Operational MCU Hi-Z

8 SER MODE Indexer Mode Serial Mode

The USMx bits are only available when the board is configured as an internal indexer (S1:8 = HI). In this

mode, the USMx bits select the microstepping rate according to Table 2.

Table 2. Microstepping Rate

Microstepping

USM2 USM1 USM2 MS Index Degrees

LO LO LO 0 512

LO LO HI 1 256

LO HI LO 2 128

LO HI HI 3 64

HI LO LO 4 32

HI LO HI 5 16

HI HI LO 6 8

HI HI HI 7 4

Changes made to the USMx, nRESET, and nSLEEP switches take effect immediately. Changes on the

MCU_MODE or SER_MODE only take effect after a reset is issued. To reset the microcontroller, press

the S2 switch or cycle the VM power rail.

2.5 Internal Indexer Mode Connectors

When operating in internal indexer mode (SER_MODE = HI or S1:8 = HI), the user must supply control

signals through the J10 header connector. A second set of control signals are derived from the J11

connector, although these signals can be preselected through the S1 DIP switch. If the J11 connector is

used, the respective switches should be positioned at the HI side so that inputs can be driven. If the

switches are positioned at the LO side, input to the microcontroller will be LO.

DRV882x Evaluation Modules SLMU002– June 2011

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