Irda Port; Limitations; Operating Voltage; Lpuart Port - ST STM32L476G-EVAL User Manual

Hardware layout and configuration
For configuration elements related with the RS-232 port operation, refer to
Table 9.
Section 2.10 brings information on using the LPUART port of STM32L476ZGT6 for RS-232,
instead of its USART1 port.
2.9.2

IrDA port

The IrDA communication port uses an IrDA transceiver (U11).
configuration elements related with the IrDA port operation
.

Table 9. Settings of configuration elements for RS-232 and IrDA ports

Element
JP15
R93, R118,
R116
R158, R119
2.9.3

Limitations

The operation of RS-232 and IrDA ports is mutually exclusive. The operation of either port is
also mutually exclusive with the NFC peripheral operation.
2.9.4

Operating voltage

The RS-232- and IrDA-related operating supply voltage of STM32L476ZGT6 (VDD line)
must be within the range from 1.71 V to 3.6 V.
2.10

LPUART port

On top of USART1 port for serial communication, the STM32L476ZGT6 offers LPUART, a
low-power UART port.
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Setting
JP15
Default setting.
1
2
RS-232 selected: PB7 port of STM32L476ZGT6 receives signal
3 4
originating from RXD terminal of CN9.
6
5
JP15
1
2
IrDA selected: PB7 port of STM32L476ZGT6 is connected with RxD
terminal of the IrDA transceiver U11.
3 4
6
5
JP15
NFC selected: PB7 port of STM32L476ZGT6 receives NFC_IRQOUT
1
2
signal from NFC peripheral.
4
3
NFC peripheral.
6
5
In Required for IrDA operation
Out Required for IrDA operation
DocID027351 Rev 3
Table 6
Table 9 shows the
Description
Section 2.28 provides more detail on the
UM1855
and