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<li class="main active"><a href="#nucleo-l053r8">Nucleo-L053R8</a></li>
<li><a href="#spi">SPI</a></li>
<li><a href="#i2c">I2C</a></li>
<li><a href="#usart">USART</a></li>
<li><a href="#i2s">I2S</a></li>
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<h1 id="nucleo-l053r8">Nucleo-L053R8</h1>
<p>Below are the pins usable for the peripherals. Pins in <strong>bold</strong> are the default.</p>
<h2 id="spi">SPI</h2>
<table>
<thead>
<tr>
<th>Instance</th>
<th>MOSI</th>
<th>MISO</th>
<th>SCK</th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>SPI1</td>
<td><strong>11 (PA7)</strong>, 23 (PA12), 4 (PB5)</td>
<td><strong>12 (PA6)</strong>, 22 (PA11), 5 (PB4)</td>
<td><strong>13 (PA5)</strong>, 3 (PB3)</td>
<td></td>
</tr>
<tr>
<td>SPI2</td>
<td><strong>33 (PB15)</strong>, 35 (PC3)</td>
<td><strong>32 (PB14)</strong>, 34 (PC2)</td>
<td><strong>6 (PB10)</strong>, 31 (PB13)</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="i2c">I2C</h2>
<table>
<thead>
<tr>
<th>Instance</th>
<th>SDA</th>
<th>SCL</th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>I2C1</td>
<td>29 (PB7), <strong>14 (PB9)</strong></td>
<td>10 (PB6), <strong>15 (PB8)</strong></td>
<td></td>
</tr>
<tr>
<td>I2C2</td>
<td><strong>PB11</strong>, 32 (PB14)</td>
<td><strong>6 (PB10)</strong>, 31 (PB13)</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="usart">USART</h2>
<table>
<thead>
<tr>
<th>Instance</th>
<th>RX</th>
<th>TX</th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>USART1</td>
<td><strong>2 (PA10)</strong>, 29 (PB7)</td>
<td><strong>8 (PA9)</strong>, 10 (PB6)</td>
<td></td>
</tr>
<tr>
<td>USART2</td>
<td><strong>0 (PA3)</strong>, 26 (PA15)</td>
<td><strong>1 (PA2)</strong>, 25 (PA14)</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="i2s">I2S</h2>
<table>
<thead>
<tr>
<th>Instance</th>
<th>CK</th>
<th>SD</th>
<th>WS</th>
<th>MCK</th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>I2S2</td>
<td><strong>31 (PB13)</strong></td>
<td><strong>33 (PB15)</strong>, 35 (PC3)</td>
<td><strong>14 (PB9)</strong>, 30 (PB12)</td>
<td><strong>32 (PB14)</strong>, 34 (PC2)</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="tim">TIM</h2>
<table>
<thead>
<tr>
<th>Instance</th>
<th>CH1</th>
<th>CH2</th>
<th>CH3</th>
<th>CH4</th>
<th></th>
</tr>
</thead>
<tbody>
<tr>
<td>TIM2</td>
<td><strong>16 (PA0)</strong>, 13 (PA5), 26 (PA15)</td>
<td><strong>17 (PA1)</strong>, 3 (PB3)</td>
<td><strong>1 (PA2)</strong>, 6 (PB10)</td>
<td><strong>0 (PA3)</strong>, PB11</td>
<td></td>
</tr>
<tr>
<td>TIM21</td>
<td><strong>1 (PA2)</strong>, 31 (PB13)</td>
<td><strong>0 (PA3)</strong>, 32 (PB14)</td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>TIM22</td>
<td><strong>12 (PA6)</strong>, 5 (PB4), 38 (PC6)</td>
<td><strong>11 (PA7)</strong>, 4 (PB5), 9 (PC7)</td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="adc">ADC</h2>
<table>
<thead>
<tr>
<th>Instance</th>
<th>Channel</th>
<th>Pin</th>
</tr>
</thead>
<tbody>
<tr>
<td>ADC</td>
<td>IN0</td>
<td>16 (PA0)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN1</td>
<td>17 (PA1)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN2</td>
<td>1 (PA2)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN3</td>
<td>0 (PA3)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN4</td>
<td>18 (PA4)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN5</td>
<td>13 (PA5)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN6</td>
<td>12 (PA6)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN7</td>
<td>11 (PA7)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN8</td>
<td>19 (PB0)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN9</td>
<td>27 (PB1)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN10</td>
<td>21 (PC0)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN11</td>
<td>20 (PC1)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN12</td>
<td>34 (PC2)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN13</td>
<td>35 (PC3)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN14</td>
<td>36 (PC4)</td>
</tr>
<tr>
<td>ADC</td>
<td>IN15</td>
<td>37 (PC5)</td>
</tr>
</tbody>
</table>
<h2 id="gpio">GPIO</h2>
<table>
<thead>
<tr>
<th>Pin</th>
<th>Peripheral signal available on the pin</th>
<th>Board macro</th>
</tr>
</thead>
<tbody>
<tr>
<td>0 (PA3)</td>
<td>ADC_IN3, COMP2_INP, LCD_SEG2, TIM2_CH4, TIM21_CH2, TSC_G1_IO4, USART2_RX</td>
<td></td>
</tr>
<tr>
<td>1 (PA2)</td>
<td>ADC_IN2, COMP2_INM, COMP2_OUT, LCD_SEG1, TIM2_CH3, TIM21_CH1, TSC_G1_IO3, USART2_TX</td>
<td></td>
</tr>
<tr>
<td>2 (PA10)</td>
<td>LCD_COM2, TSC_G4_IO2, USART1_RX</td>
<td></td>
</tr>
<tr>
<td>3 (PB3)</td>
<td>LCD_SEG7, SPI1_SCK, TIM2_CH2, TSC_G5_IO1</td>
<td></td>
</tr>
<tr>
<td>4 (PB5)</td>
<td>I2C1_SMBA, LCD_SEG9, LPTIM1_IN1, SPI1_MOSI, TIM22_CH2</td>
<td></td>
</tr>
<tr>
<td>5 (PB4)</td>
<td>LCD_SEG8, SPI1_MISO, TIM22_CH1, TSC_G5_IO2</td>
<td></td>
</tr>
<tr>
<td>6 (PB10)</td>
<td>I2C2_SCL, LCD_SEG10, LPUART1_TX, SPI2_SCK, TIM2_CH3, TSC_SYNC</td>
<td></td>
</tr>
<tr>
<td>7 (PA8)</td>
<td>CRS_SYNC, LCD_COM0, RCC_MCO, USART1_CK</td>
<td></td>
</tr>
<tr>
<td>8 (PA9)</td>
<td>LCD_COM1, RCC_MCO, TSC_G4_IO1, USART1_TX</td>
<td></td>
</tr>
<tr>
<td>9 (PC7)</td>
<td>LCD_SEG25, TIM22_CH2, TSC_G8_IO2</td>
<td></td>
</tr>
<tr>
<td>10 (PB6)</td>
<td>I2C1_SCL, LPTIM1_ETR, TSC_G5_IO3, USART1_TX</td>
<td></td>
</tr>
<tr>
<td>11 (PA7)</td>
<td>ADC_IN7, COMP2_OUT, LCD_SEG4, SPI1_MOSI, TIM22_CH2, TSC_G2_IO4</td>
<td><strong>MOSI</strong></td>
</tr>
<tr>
<td>12 (PA6)</td>
<td>ADC_IN6, COMP1_OUT, LCD_SEG3, LPUART1_CTS, SPI1_MISO, TIM22_CH1, TSC_G2_IO3</td>
<td><strong>MISO</strong></td>
</tr>
<tr>
<td>13 (PA5)</td>
<td>ADC_IN5, SPI1_SCK, TIM2_CH1, TIM2_ETR, TSC_G2_IO2</td>
<td><strong>LED_BUILTIN</strong>, <strong>SCK</strong></td>
</tr>
<tr>
<td>14 (PB9)</td>
<td>I2C1_SDA, I2S2_WS, LCD_COM3, SPI2_NSS</td>
<td><strong>SDA</strong></td>
</tr>
<tr>
<td>15 (PB8)</td>
<td>I2C1_SCL, LCD_SEG16, TSC_SYNC</td>
<td><strong>SCL</strong></td>
</tr>
<tr>
<td>16 (PA0)</td>
<td>ADC_IN0, COMP1_INM, COMP1_OUT, RTC_TAMP2, SYS_WKUP1, TIM2_CH1, TIM2_ETR, TSC_G1_IO1, USART2_CTS</td>
<td><strong>A0</strong></td>
</tr>
<tr>
<td>17 (PA1)</td>
<td>ADC_IN1, COMP1_INP, LCD_SEG0, TIM2_CH2, TIM21_ETR, TSC_G1_IO2, USART2_DE, USART2_RTS</td>
<td><strong>A1</strong></td>
</tr>
<tr>
<td>18 (PA4)</td>
<td>ADC_IN4, DAC_OUT1, SPI1_NSS, TIM22_ETR, TSC_G2_IO1, USART2_CK</td>
<td><strong>A2</strong>, <strong>SS</strong></td>
</tr>
<tr>
<td>19 (PB0)</td>
<td>ADC_IN8, LCD_SEG5, LCD_VLCD3, SYS_VREF_OUT_PB0, TSC_G3_IO2</td>
<td><strong>A3</strong></td>
</tr>
<tr>
<td>20 (PC1)</td>
<td>ADC_IN11, LCD_SEG19, LPTIM1_OUT, TSC_G7_IO2</td>
<td><strong>A4</strong></td>
</tr>
<tr>
<td>21 (PC0)</td>
<td>ADC_IN10, LCD_SEG18, LPTIM1_IN1, TSC_G7_IO1</td>
<td><strong>A5</strong></td>
</tr>
<tr>
<td>22 (PA11)</td>
<td>COMP1_OUT, SPI1_MISO, TSC_G4_IO3, USART1_CTS, USB_DM</td>
<td></td>
</tr>
<tr>
<td>23 (PA12)</td>
<td>COMP2_OUT, SPI1_MOSI, TSC_G4_IO4, USART1_DE, USART1_RTS, USB_DP</td>
<td></td>
</tr>
<tr>
<td>24 (PA13)</td>
<td>SYS_SWDIO, USB_NOE</td>
<td></td>
</tr>
<tr>
<td>25 (PA14)</td>
<td>SYS_SWCLK, USART2_TX</td>
<td></td>
</tr>
<tr>
<td>26 (PA15)</td>
<td>LCD_SEG17, SPI1_NSS, TIM2_CH1, TIM2_ETR, USART2_RX</td>
<td></td>
</tr>
<tr>
<td>27 (PB1)</td>
<td>ADC_IN9, LCD_SEG6, LPUART1_DE, LPUART1_RTS, SYS_VREF_OUT_PB1, TSC_G3_IO3</td>
<td></td>
</tr>
<tr>
<td>28 (PB2)</td>
<td>LCD_VLCD1, LPTIM1_OUT, TSC_G3_IO4</td>
<td></td>
</tr>
<tr>
<td>29 (PB7)</td>
<td>I2C1_SDA, LPTIM1_IN2, SYS_PVD_IN, TSC_G5_IO4, USART1_RX</td>
<td></td>
</tr>
<tr>
<td>30 (PB12)</td>
<td>I2S2_WS, LCD_SEG12, LCD_VLCD2, LPUART1_DE, LPUART1_RTS, SPI2_NSS, TSC_G6_IO2</td>
<td></td>
</tr>
<tr>
<td>31 (PB13)</td>
<td>I2C2_SCL, I2S2_CK, LCD_SEG13, LPUART1_CTS, SPI2_SCK, TIM21_CH1, TSC_G6_IO3</td>
<td></td>
</tr>
<tr>
<td>32 (PB14)</td>
<td>I2C2_SDA, I2S2_MCK, LCD_SEG14, LPUART1_DE, LPUART1_RTS, RTC_OUT_ALARM, RTC_OUT_CALIB, SPI2_MISO, TIM21_CH2, TSC_G6_IO4</td>
<td></td>
</tr>
<tr>
<td>33 (PB15)</td>
<td>I2S2_SD, LCD_SEG15, RTC_REFIN, SPI2_MOSI</td>
<td></td>
</tr>
<tr>
<td>34 (PC2)</td>
<td>ADC_IN12, I2S2_MCK, LCD_SEG20, LPTIM1_IN2, SPI2_MISO, TSC_G7_IO3</td>
<td></td>
</tr>
<tr>
<td>35 (PC3)</td>
<td>ADC_IN13, I2S2_SD, LCD_SEG21, LPTIM1_ETR, SPI2_MOSI, TSC_G7_IO4</td>
<td></td>
</tr>
<tr>
<td>36 (PC4)</td>
<td>ADC_IN14, LCD_SEG22, LPUART1_TX</td>
<td></td>
</tr>
<tr>
<td>37 (PC5)</td>
<td>ADC_IN15, LCD_SEG23, LPUART1_RX, TSC_G3_IO1</td>
<td></td>
</tr>
<tr>
<td>38 (PC6)</td>
<td>LCD_SEG24, TIM22_CH1, TSC_G8_IO1</td>
<td></td>
</tr>
<tr>
<td>39 (PC8)</td>
<td>LCD_SEG26, TIM22_ETR, TSC_G8_IO3</td>
<td></td>
</tr>
<tr>
<td>40 (PC9)</td>
<td>DAC_EXTI9, LCD_SEG27, TIM21_ETR, TSC_G8_IO4, USB_NOE</td>
<td></td>
</tr>
<tr>
<td>41 (PC10)</td>
<td>LCD_COM4, LCD_SEG28, LPUART1_TX</td>
<td></td>
</tr>
<tr>
<td>42 (PC11)</td>
<td>LCD_COM5, LCD_SEG29, LPUART1_RX</td>
<td></td>
</tr>
<tr>
<td>43 (PC12)</td>
<td>LCD_COM6, LCD_SEG30</td>
<td></td>
</tr>
<tr>
<td>44 (PC13)</td>
<td>RTC_TAMP1, RTC_TS, SYS_WKUP2</td>
<td></td>
</tr>
<tr>
<td>45 (PC14)</td>
<td>RCC_OSC32_IN</td>
<td></td>
</tr>
<tr>
<td>46 (PC15)</td>
<td>RCC_OSC32_OUT</td>
<td></td>
</tr>
<tr>
<td>47 (PD2)</td>
<td>LCD_COM7, LCD_SEG31, LPUART1_DE, LPUART1_RTS</td>
<td></td>
</tr>
</tbody>
</table></div>
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