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

Product codes
EVAL6460
Download
Page of 139
L6460 
GPIO pins
Doc ID 17713 Rev 1
95/139
   
   
   
22 GPIO 
pins
Some of the pins of L6460 are indicated as GPIO (General purpose I/O). These pins can be 
configured to be used in different ways depending on customer application. All GPIOs can 
be used as digital input/output pins with digital value settable/readable using serial interface 
or as analog input pins that can be converted using the A2D system. Some of the pins can 
be used for special purposes: i.e. two of them can be used to access to the pass switch 
function, other two are used as feedback pins for the auxiliary synchronous switching 
regulators. 
All input Schmitt triggers and output circuitry used for start-up purposes are powered by the 
internally generated V
3v3
, while the digital output buffers are powered by V
GPIO_SPI
 pin. To 
ensure independency between V
3v3
 and V
GPIO_SPI
 the GPIOs output drivers are open-drain 
driver or the high side MOS is in back-to-back configuration to avoid the presence of the 
body diode between output and supply.
All digital output signals can be inverted before being provided on the relative GPIO pins.
Here below is reported the table with GPIO functions.
         
Table 39.
GPIO functions description 
Pin 
Name
Function
(1)
Notes
Input
Output
Special
Analog
Digital
Analog
Digital
GPIO[0]
- ADC input
- SPI IN
- SPI OUT
- Interrupt ctrl.
- AuxPwm1
- AuxPwm2
Start-up 
configuration 
pin
Open drain 
output
GPIO[1]
- ADC input
- Comp1 In-
- Vaux1 F.B.
- SPI IN
- SPI OUT
- Interrupt ctrl. 
- AuxPwm1 
- AuxPwm2
Open drain 
output
GPIO[2]
- ADC input 
- Comp2 In-
- Vaux2 F.B.
- SPI IN
- IN PWM
- SPI OUT
- Interrupt ctrl. 
- AuxPwm2
- AuxPwm3
Open drain 
output
GPIO[3]
- ADC input
- SPI IN
- SPI OUT
- AuxPwm2 
- AuxGpPwm3
Start-up 
configuration 
pin
Open drain 
output
GPIO[4]
- ADC input
- SPI IN
- SPI OUT
- Interrupt ctrl. 
- AuxPwm1
- AuxPwm3
Start-up 
configuration
pin
Open drain 
output
GPIO[5]
- ADC input
- SPI IN
- SPI OUT
- Reg. loop 1 
- Comp1 out
- AuxPwm3
Slave Control
Full driver BB 
powered by 
V
3v3