Irda Port; Limitations; Operating Voltage; Lpuart Port - STMicroelectronics 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
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.
26/100
brings information on using the LPUART port of STM32L476ZGT6 for RS-232,
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.
4
3
6
5
JP15
NFC selected: PB7 port of STM32L476ZGT6 receives NFC_IRQOUT
1
2
signal from NFC peripheral.
3 4
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