Touch-Sensing Buttons; Table 10. Rs232, Rs485 And Irda Related Jumpers; Table 11. Rs485 Related Solder Bridges; Table 12. Touch-Sensing Button Related Solder Bridges - ST STM32303E-EVAL User Manual

UM1807
2.9
Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com.
Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from

Table 10. RS232, RS485 and IrDA related jumpers

Jumper
RS232_RX is connected to the RS232 transceiver
and the RS232 communication is enabled when JP13
is set as shown to the right (default setting):
RS485_RX is connected to the RS485 transceiver
JP13 and the RS485 communication is enabled when JP13
is set as shown to the right:
IrDA_RX is connected to the IrDA transceiver and the
IrDA communication is enabled when JP13 is set as
shown to the right:
The RS485 communication is supported by the RS485 transceiver, ST3485EBDR, which is
connected to pin4 and pin9 of D-type 9-pin connectors CN8 (share the same connector with
USART1).

Table 11. RS485 related solder bridges

Jumper
The external failsafe biasing is enabled when solder bridges SB17 and
SB18 are closed.
SB17, SB18
Default setting: Not fitted
The bus termination is enabled when solder bridge SB16 is closed.
SB16
Default setting: Not fitted.

Touch-sensing buttons

The STM32303E-EVAL evaluation board supports two touch-sensing buttons based on the
charge transfer technology.

Table 12. Touch-sensing button related solder bridges

Solder bridge
PD13 is connected to the touch button when SB6 is open.
(Default setting)
SB6
PD13 is connected to the extension connector CN7 when SB6 is closed. In
such a case, R104 must be removed to avoid disturbance due to the touch
button.
Hardware layout and configuration
Description
Description
Description
DocID026738 Rev 1
Setting
17/61
60