Can; Ir Led And Ir Receiver; High Brightness Led; Humidity Sensor - ST STM32303C-EVAL User Manual

UM1567
2.14

CAN

The STM32303C-EVAL evaluation board supports one channel of a CAN2.0A/B compliant
bus communication based on the 3.3V CAN transceiver. The high-speed mode, standby
mode and slope control mode are available and can be selected by setting JP4.
Table 15.
Jumper
JP4
JP3
CAN will work properly when VDD > 3 V.
2.15

IR LED and IR receiver

The IR receiver, TSOP34836, is connected to PA9 of STM32F303VCT6 and the IR LED is
driven by PB9 through transistors T4 and T5 on the board. The IR receiver depends on
JP18 jumper setting, as shown in
Note: The IR LED may be driven by PB9 directly when SB19 is closed and R281 is removed.
2.16

High brightness LED

An amber high brightness LED and its power control circuits are on the STM32303C-EVAL
board. The brightness can be adjusted by the PWM signal from STM32F303VCT6 through
PE13. The current on the LED can be monitored by the STM32F303 thanks to the voltage
measured on PD14, which corresponds to current through R261 (10 ohm).
2.17

Humidity sensor

A humidity sensor, HS1101LF, is on the STM32303C-EVAL board. The charge control signal
is connected to the timer in STM32F303VCT6 through PC8, and the measured result of
HS1101LF is connected with PB0.
Note: Please keep VDDA =V DDIO during the measurement.
A 180 pF 1% capacitor, C121, is used to calibrate the humidity sensor by setting JP19.
CAN related jumpers
The CAN transceiver is working in standby mode when JP4
is set as shown to the right:
The CAN transceiver is working in high-speed mode when
JP4 is set as shown to the right: (default setting)
The CAN transceiver is working in slope control mode
when JP4 is open.
The CAN terminal resistor is enabled when JP3 is fitted.
Default setting: Not fitted
Table
Doc ID 023581 Rev 2
Hardware layout and configuration
Description
10.
Setting
19/58