====NUCLEO-L073RZ====

32 MHz STM32L073RZ Cortex-M0+ with 192 KB flash and 20 KB RAM.

<wrap right>
{{boards:lrwan2.jpg?100}}
\\ \\
{{boards:l073rz-front.jpg?100}}
\\ \\
{{boards:l073rz-back.jpg?100}}
\\ \\
{{boards:ardl073rz.jpg?100}}
\\ \\
{{boards:stlinkdaughter.jpg?100}}
</wrap>

===Pinout===

<code>
PC10 USART4_TX
PC11 USART4_RX

CN3 STLINK RX
CN3 STLINK TX
</code>

===Solder bridges===

==USART==

__Default for standalone NUCLEO-L073RZ__

SB13 and SB14 ON, SB62 and SB63 OFF
<code>
PA2 USART2_TX ST-LINK RX
PA3 USART2_RX ST-LINK TX
</code>

__Default for NUCLEO-L073RZ with [[lrwan1|I-NUCLEO-LRWAN1]]__

SB13 and SB14 OFF, SB62 and SB63 ON
<code>
PA2 USART2_TX ARD D1 TX
PA3 USART2_RX ARD D0 RX
</code>

===ST-LINK===

By removing the two jumpers at CN2, the ST-LINK interface can be used
to program another board such as the  [[lrwan1|I-NUCLEO-LRWAN1]] daughterboard.


<code>
1 VDD TARGET
2 SWCLK
3 GND
4 SWDIO
5 NRST
6 SWO (RESERVED)
</code>
===Resources===

[[https://www.st.com/en/evaluation-tools/nucleo-l073rz.html|Product page]]

[[https://www.st.com/resource/en/user_manual/um1724-stm32-nucleo64-boards-mb1136-stmicroelectronics.pdf|User manual]]

[[https://www.st.com/resource/en/schematic_pack/mb1136-default-c04_schematic.pdf|Schematic]]

[[https://www.st.com/resource/en/datasheet/stm32l073rz.pdf|MCU data-sheet]]

[[https://www.st.com/resource/en/reference_manual/rm0367-ultralowpower-stm32l0x3-advanced-armbased-32bit-mcus-stmicroelectronics.pdf|MCU reference manual]]

[[https://www.st.com/en/evaluation-tools/p-nucleo-lrwan1.html|P-NUCLEO-LRWAN1]]

[[https://www.st.com/en/evaluation-tools/p-nucleo-lrwan2.html|P-NUCLEO-LRWAN2]]