Fiio X3

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Overview

This is the page for the Fiio X3 port. This player shares some similarity with the FiioX1. For the 2nd generation of this device, refer to FiioX3Gen2.

Port Status

See FiioX3Port

Main Features

• Capacities: 128M internal Flash
• TFT screen (320 x 240, 30 FPS) LCD screen
• Headphone output
• Lineout/spdif output
• 24-bit/192KHz DAC + amplifier
• Hi-speed micro-USB 2.0 port
• Expandable microSD card slot and microSDHC card slot

Recovery mode

The JZ4760 chip has a usb recovery mode documented in the datasheet. The Fiio X1 can be put in this mode by the following procedure:

• Turn off the device
• Push the rewind/down button
• While holding the rewind/down button down, plug in the USB cable
• The screen will stay black and the device will then register itself as a Ingenic device: 601a:470 Ingenic Semiconductor Ltd.

When in recovery mode, the device uses a custom protocol documented in the datasheet. There is a tool in the rockbox repository to send commands to the device.

Boot Procedure

Fill that

Factory boot

By holding the back button, the device will enter recovery mode and check for factory.x3. If this file exists, it will load it to memory, unscramble it (using the same scrambling algorithm as for FiioFirmware sys.bin) and run it at address 0x80001000.

Upgrade procedure

By holding the back button, the device will enter recovery mode and check for x3.fw to perform an upgrade. The file must use the FiioFirmware format. The exact way the upgrade procedure works is unclear.

eMMC format

Fix that The first 2MB are reserved for the IPL, containing many copies of it, as described in the datasheet. The SPL is at 2MiB and of size 1MiB. More investigation are needed to understand the structure of the flash file system and how does it compare to the upgrade file.

Firmware Files

See FiioFirmware for an analysis of the Fiio firmware format.

Components

• Ingenic JZ4760B: basically a JZ4760 with a few modifications. See IngenicJz47xx
• DL240QV018T or TF24013A (ILI9341 driver): LCD
• WM8740SEDS: DAC 24-bit/292kHz
• 2x Hynix H5PS1G63EFR: 1Gb DDR2 gives 256MB RAM
• NCTSTM16-08G: 8GB eMMC
• AD8397: pre-amplifier
• AD8692: headphone amplifier
• NJW1194: volume/tone control
• AXP192: PMU
• HFD4/5-S1: relay

PCB Scans

-- AmauryPouly - 06 Apr 2015