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UM1590
1.8
Interfaces
1.8.1
RS232, RS485 and IrDA
RS232, RS485 and IrDA communications are performed through the following connectors:
●
RS232 and RS485: a D-type 9-pin coonector (CN8)
●
IrDA transceiver U10 is connected to USART1 of the board STM32F30x/31x.
1.9
Miscellaneous peripherals
1.9.1
Joystick
The STM32303C-EVAL evaluation board features a four-direction joystick with a selection
button at the center named SEL.
1.9.2
Push-buttons
The following push-buttons are available:
●
KEY
1.9.3
Potentiometer
A successive approximation ADC channel (ADC12) is connected to an on-board variable
resistor. The variable resistor provides a voltage in the range of 0 V to 3.3 V.
1.9.4
Audio
The STM32303C-EVAL evaluation board supports stereo audio play, using an audio
DAC CS42L52 connected to I2S2 port of STM32F30x/31x microcontroller.
1.9.5
MicroSD card
The STM32303C-EVAL evaluation board features a MicroSD card connector connected to
the SPI peripheral.
1.9.6
RF EEPROM
RF EEPROM daughter board implemented on the module is the M24LR64-R. The daughter
board can be connected on CN1 to the STM32F30x/31x via the I2C bus.
The I2C address of the RF EEPROM is 0b1010E2E1E0. The E0-E2 values are determined
by the RF EEPROM daughter board.
1.9.7
IR LED and IR receiver
The IR receiver TSOP34836 is connected to PA9 on the STM32F30x/31x. The IR LED is
driven by PB9 through transistors T4 and T5 on the board.
Functional description of the evaluation board
Doc ID 023892 Rev 1
9/65
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