Hardware layout and configuration
UM1521
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Doc ID 022868 Rev 1
Figure 7.
R39 resistor placement
Note:
If Bootloader_RESET signal is not used, remove R39 to avoid disturbance due to CTS
signal from pin8 of CN1, which could cause MCU reset with some software.
The LCD glass module has to be mounted on IO position for USART1 usage. Refer to
for detail.
Table 14.
RS-232 & IrDA related jumpers
Jumper
Description
Setting
JP4
USART1_RX is connected to RS-232 transceiver and RS-232 communication is
enabled when JP4 is set as shown to the right(
Default setting
):
USART1_RX is connected to IrDA transceiver and IrDA communication is
enabled when JP4 is set as shown to the right:
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