STMicroelectronics FlexSPIN: SPI configurable stepper and DC multi motor driver evaluation board EVAL6460 EVAL6460 Data Sheet

Doc ID 17713 Rev 1

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The GPIO[2] truth table is (for the abbreviation list please refer to 

).

1

X

X

X

X

AUX2  FB

(1)

1.

AUX2Enable or AUX2System bit =1 represent the case in which AUX1 is used as a System or Not System 
regulator.

0

0

0

X

X

HiZ  (SPI_IN)

0

0

1

X

X

Comp1 IN -

(2)

2.

In all configurations in which GPIO[2] is enabled as output:

a) the GPIO[2] pin can be always used as an analog input to the ADC system (ADC function) by writing 

its address in the A2DChannelX[4:0] in the A2DConfigX register and starting a conversion;

b) the GPIO[2] pin can be always used as a digital input so its value can be always read through SPI 

interface (SPI_IN function);

c)

please note that GPIO[2] output is directly connected to ExtPWM3 input for Bridge 3 or 4 and therefore 
particular care must be taken in order to avoid wrong PWM signals when ExtPWM3 is selected for 
bridge 3 or 4;

d) the GPIO[2] pin is an open drain output.

0

1

0

0

0

SPI OUT

0

1

0

0

1

AuxPwm2

0

1

0

1

0

AuxPwm3

0

1

0

1

1

InterruptCtrl

0

1

1

0

0

SPI OUT inverted

0

1

1

0

1

AuxPwm2  inverted

0

1

1

1

0

AuxPwm3  inverted

0

1

1

1

1

IntCtrlinverted