dsPIC33CK Low-Voltage Motor Control Board User’s Guide
DS50002927A-page 16
2020 Microchip Technology Inc.
2.2.2
UART Interface Header (J3)
A 5-pin header, J3, is a UART interface provided to connect an external UART-USB
converter or for accessing UART signals by disabling the MCP2200 device (see U13
in
).
summarizes the pin functions of connector J3.
TABLE 2-4:
PIN DESCRIPTION – CONNECTOR J3
2.2.3
USB Serial Interface (J6)
The Motor Control Board uses an on-board MCP2200 device (see U13 in
)
as a bridge between the UART and USB (see
) for providing the host PC
interface.
TABLE 2-5:
PIN DESCRIPTION – CONNECTOR J6
2.2.4
Hall Sensor Interface Connector (J7)
Hall sensors are used to detect the rotor position and speed of the motor. Connector
J7 can be used to interface the Hall sensor outputs with the Motor Control Board,
enabling sensor-based BLDC motor control applications.
shows the pin
descriptions of connector J7. The connector provides two supply outputs, +5V and
+3.3V, which can be used as input supplies of the Hall sensors based on the sensor
specification.
TABLE 2-6:
PIN DESCRIPTION – CONNECTOR J7
Pin #
Signal Name
Pin Description
1
+3.3V
+3.3V Supply
2
DEBUG_TX
UART Transmit Pin of dsPIC
®
DSC
3
DEBUG_RX
UART Receive Pin of dsPIC DSC
4
DGND
Digital Ground
5
MCP2200_RST
Setting this Pin Low (connecting to Ground) will
Disable the MCP2200 (U13)
Pin #
Signal Name
Pin Description
0
No Connection
Body is Connected to Digital Ground
1
5V_USB
USB +5 V
DC
2
UART_USB_N
USB Data-
3
UART_USB_P
USB Data+
4
No Connection
—
5
GND
Digital Ground
Pin #
Signal Name
Pin Description
1
+5V
+5V Supply to Hall Sensors
2
+3.3V
+3.3V Supply to Hall Sensors
3
DGND
Digital Ground
4
HA
Hall Sensor A Feedback from the Motor
5
HB
Hall Sensor B Feedback from the Motor
6
HC
Hall Sensor C Feedback from the Motor
