TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005)
13
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 overtemperature). In this
mode, the pin is never tristated.
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
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