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en/docs/dev_doc/a316/Firmware-without-development-en.md

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+---
+title: XMOS No-Development Firmware Download and Instructions
+status: new
+---
+
+# XMOS A316 No-Development Firmware Download and Instructions
+
+## [Click to Download Firmware](../../assets/download/a316-8711-5.1make/A316免开发固件firmware_gen_0.0.5.zip)
+
+## Function Mode Switching
+Use command byte 0x23 to send the following commands for corresponding mode switching
+
+[UART Communication Protocol Reference](../../dev_doc/a316/xu316-protocol-english.md)
+
+| Interface Type         | 0x23 Command (Byte1-5 Combination) |
+| :-------------------- | :---- |
+| USB in-I2S out        | 0x0080a90001 |
+| UAC1.0                | 0x0080010002 |
+| Coaxial IN-I2S OUT    | 0x0080651003 |
+| Optical IN-I2S OUT    | 0x1080651004 |
+| USB IN-SPDIF OUT      | 0x2080651005 |
+| I2S(slave) in-I2S OUT | 0x0080c50806 |
+| HDMI ARc IN-I2S OUT   | 0x0082d58107 |
+
+## MCU Connection Instructions for Demo Version
+
+HOST UART TX  <==>   XU316 X0D37
+
+HOST UART RX  <==>   XU316 X0D31
+
+![pin](../../assets/images/hifi_audio/A316-pin.png){width="700"}
+
+## Please Refer to Portmap for Other Connection Functions
+
+[Click to View Full Portmap](../../assets/images/hifi_audio/portmap_gen_firmware_USB.png)
+
+1. factory_no_mqa_0.0.5.bin is the factory firmware, use the following command to flash (requires xtag flashing tool):
+
+``` sete
+xflash --write-all factory_no_mqa_0.0.5.bin --target-file xu316_qf60.xn
+```
+
+2. update_no_mqa_0.0.5.bin is the DFU firmware, requires the driver's DFU upgrade tool to update