3 Peripherals

3.1 User LED

There is one user-controllable LED available on the Multi-Phase Power Board. The LED is red and can be activated by pulling the connected I/O line low.

Table 3-1. LED Connection
Position on Adapter Connector	Silk Screen Marking
33	LED

3.2 User Switch

The Multi-Phase Power Board features a push-button switch, which pulls the connected I/O line low when pressed.

Table 3-2. Switch Connection
Position on Adapter Connector	Silk Screen Marking
35	SWITCH

3.3 User Potentiometer

There is a 10 kΩ potentiometer on the Multi-Phase Power Board. It is connected as a voltage divider and supplies a linearly adjustable voltage to the Adapter connector.

Table 3-3. Potentiometer Connection
Position on Adapter Connector	Silk Screen Marking
29	POT-METER

3.4 Temperature Sensor

An MCP9701 analog temperature sensor is located in the power stage of the Multi-Phase Power Board, close to the phase connector.

The output voltage is a linear function of the measured temperature:

$V_{OUT} [mV] = 19.5 \times T[℃] + 400$

Table 3-4. Temperature Sensor Connection
Position on Adapter Connector	Location
31	Between phase B and C

3.5 Hall Sensor Header


The Hall sensor connector is a 5-pin 100-mil header for connecting push-pull or open-drain hall sensors. Pull-up resistors set idle signals to 5V, while level shifters adjust the hall signals to 3.3V for the Adapter connector.

Info: The bi-directional level shifters allow the Hall sensor pins to function as both inputs and outputs.

Table 3-5. Hall Sensor Connections
Position on Hall Sensor Connector	Silk Screen Marking	Position on Adapter Connector
1	+5V	–
2	A	36
3	B	34
4	C	32
5	GND	–

3.6 PWM Input Header


The PWM input header is a 3-pin 100-mil header with a pinout compatible with standard hobby servos. A pull-up resistor sets the idle signal to 5V, while a level shifter adjusts the PWM signal to 3.3V for the Adapter connector. A 6.8Ω resistor between the +5V pin and the on-board +5V regulator acts as protection against accidental short circuits.

Info: The bi-directional level shifter allows the PWM header to function as both an input and output.

Table 3-6. PWM Header Connections
Position on PWM In Connector	Silk Screen Marking	Position on Adapter Connector
1	PWM	18
2	+5V	–
3	GND	–