Extension Connectors Cn5, Cn6, Cn13, And Cn14; User Leds; Physical Input Devices - ST STM32L4R9I-EVAL User Manual

Hardware layout and configuration
6.15

Extension connectors CN5, CN6, CN13, and CN14

The CN5, CN6, CN13, and CN14 headers complement to give access to all GPIOs of the
STM32L4R9AII6 microcontroller. In addition to GPIOs, the following signals and power
supply lines are also routed on CN5 or CN6 or CN13 or CN14:
•
GND
•
+5 V
•
+3.3 V
•
D5V
•
VDD
•
RESET#
•
Clock terminals PC14-OSC32_IN, PC15-OSC32_OUT, PH0-OSC_IN, PH1-OSC_OUT
Each header has two rows of 20 pins, with 1.27 mm pitch and 2.54 mm row spacing. For
extension modules, SAMTEC RSM-120-02-L-D-xxx and SMS-120-x-x-D are recommendable
as SMD and through-hole receptacles, respectively (x is a wild card).
6.16

User LEDs

Four general-purpose color LEDs (LD1, LD2, LD3, LD4) are available as light indicators.
Each LED is ON with a low level of the corresponding ports of STM32L4R9AII6.
And the four LEDs are exclusive with MC operation.
6.17

Physical input devices

The STM32L4R9I-EVAL board provides several input devices for physical human control,
listed below:
•
four-way joystick controller with select key (B1)
•
wake-up/ tamper button (B3)
•
reset button (B2)
•
10 kΩ potentiometer (RV2)
•
light-dependent resistor, LDR (R121)
The potentiometer and the light-dependent resistor are mutually exclusively rout-able to either
PB4 or PA0 port of STM32L4R9AII6.
jumpers.
As illustrated in the schematic diagram, the PB4 port is routed, in the STM32L4R9AII6, to the
non-inverting input of comparator Comp2. The PA0 is routed to the non-inverting input of the
operational amplifier OpAmp1.
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Table 11 depicts the setting of associated configuration
UM2248 Rev 4
UM2248