TMC239 / TMC239A DATA SHEET (V2.11 / 2009-Jul-30)

17

Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG

Classical non-SPI control mode (stand alone mode)

The driver can be controlled by analog current control signals and digital phase signals. To enable this

mode, tie pin SPE to GND. In this mode, the SPI interface is disabled and the SPI input pins have

alternate functions. The internal DACs are forced to “1111”.

Pin functions in stand alone mode

Pin

Stand alone

mode name

Function in stand alone mode

SPE

(GND)

Tie to GND to enable stand alone mode

ANN

MDAN

Enable mixed decay for bridge A (low = enable)

SCK

MDBN

Enable mixed decay for bridge B (low = enable)

SDI

PHA

Polarity bridge A (low = current flow from output OA1 to OA2)

CSN

PHB

Polarity bridge B (low = current flow from output OB1 to OB2)

SDO

ERR

Error output (high = overcurrent on any bridge, or over temperature). In this

mode, the pin is never tri-stated.

ENN

ENN

Standby mode (high active), high causes a low power mode of the device.

Setting this pin high also resets all error conditions.

INA,

INB

INA,

INB

Current control for bridge A, resp. bridge B. Refer to AGND. The sense

resistor trip voltage is 0.34V when the input voltage is 2.0V. Maximum input

voltage is 3.0V.

Input signals for microstep control in stand alone mode

Attention: When transferring these waves to SPI operation, please remark, that the mixed decay bits

are inverted when compared to stand alone mode.

90°

180°

270°

360°

INA

INB

PHA

(SDI)

PHB

(CSN)

MDAN

(ANN)

MDBN

(SCK)

Use dotted line to improve performance

at medium velocities