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→Pinout and detailed pin functions
==Pinout and detailed pin functions==
{| class="wikitable" | {{table}}
| align="center" style="background:#f0f0f0;"|'''Pin number'''
| align="center" style="background:#f0f0f0;"|'''Name'''
| align="center" style="background:#f0f0f0;"|'''Type'''
| align="center" style="background:#f0f0f0;"|'''Description'''
| align="center" style="background:#f0f0f0;"|'''Voltage'''
| align="center" style="background:#f0f0f0;"|'''Note'''
|-
| 1||BT_EN||Power||Main power supply input||2.0 – 5.5V||
|-
| 2||WIFI_EN||Power||Main power supply input||2.0 – 5.5V||
|-
| 3||UART2_RTSn||Power||Backup power supply input (available on request)||1.8 – 5.5V||If not available, please leave unconnected.
|-
| 4||WIFI_IRQ||Power||Backup power supply input (available on request)||1.8 – 5.5V||If not available, please leave unconnected.
|-
| 5||UART2_TXD||||Ground||||
|-
| 6||BT_F2||||Ground||||
|-
| 7||UART2_CTSn||||Reserved for future use||-||Please leave unconnected.
|-
| 8||WIFI_CLK_REQ(A)||||Reserved for future use||-||Please leave unconnected.
|-
| 9||UART2_RXD||||Reserved for future use||-||Please leave unconnected.
|-
| 10||NC||Open-drain output||Status indicator for backup power supply. Pulls down when power is drawn from VIN_AUX rail.||||Can be left open or grounded when not used.
|-
| 11||DGND||Open-drain output||Overcurrent/thermal warning indicator. Pulls down when either main power supply or backup power supply current exceeds its current limit (4A) or die temperature of internal switch (130°C) is close to thermal shutdown.||||
|-
| 12||NC||Open-drain output||Status indicator for main power supply. Pulls down when power is drawn from VIN_AUX rail.||||Can be left open or grounded when not used. When used, must be pulled-hi
|-
| 13||DAT3||||Reserved for future use||-||Please leave unconnected.
|-
| 14||NC||||Reserved for future use||-||Please leave unconnected.
|-
| 15||DAT2||||Reserved for future use||-||Please leave unconnected.
|-
| 16||NC||||Reserved for future use||-||Please leave unconnected.
|-
| 17||DAT1||||Reserved for future use||-||Please leave unconnected.
|-
| 18||NC||||Reserved for future use||-||Please leave unconnected.
|-
| 19||DAT0||||Ground||||
|-
| 20||NC||||Ground||||
|-
| 21||DGND||Differential||USB data port (positive)||||
|-
| 22||DGND||Differential||USB data port (negative)||||
|-
| 23||SDO_CMD||||Ground||||
|-
| 24||SDO_CLK||||Reserved for future use||-||Please leave unconnected.
|-
| 25||DGND||||Reserved for future use||-||Please leave unconnected.
|-
| 26||DGND||||Ground||||
|-
| 27||3.3V||||Ground||||
|-
| 28||3.3V||||Reserved for future use||-||Please leave unconnected.
|-
| 29||5V||||Reserved for future use||-||Please leave unconnected.
|-
| 30||5V||||Reserved for future use||-||Please leave unconnected.
|-
|
|}
===Reset===