When downloaded not suitable for their own machines firmware, which can lead to boot after the upgrade, or not on-line, no longer be able to upgrade back to the original firmware, can short-circuit FLASH to empty the flash and upgrade again.
1, MP3 apart, to see Flash.

2, with metal (such as Fine wire, tweezers, etc.) will be the cutting-edge Flash of paragraphs 29 and 30-pin short-circuit. (flash of dots that was 1 foot, for the anti-clockwise order, followed by 2,3 ,.......。 flash in your face right from the bottom-up a few paragraphs 5 and 6 feet)

3, and  connects to the USB connection.

4, about two seconds after the computer will find the new USB2.0 equipment.

5, at this time can be opened with tweezers, in the correct way to a firmware upgrade it.

If the firmware upgrade failure to connect the computer because of the wrong firmware guide, the computer can not find MP3, but would short-circuit Flash data lines, there will not be any firmware implementation, the computer will find an empty MP3, then on Can re-upgrade the firmware. The above method we can try.


Below are the pin-definition FLASH

FLASH-pin:
1/2/3/4/5/6 empty feet
  7 RB Reading \ busy, active LOW
  8 RE can be read, LOW
  9 CE chip can be selected, LOW
  10/11 Air feet
  12 VCC power supply, typically 3 V
  13 Vss to
  14/15 Air feet
  16 CLE public can be stored -
  17 ALE address can be stored
  18 WE-enabled headset, LOW
  19 WP ear protection, LOW
  20/21/22/23/24/25/26/27/28 air feet
  29 I / O 0 8 0 data bus
  30 I / O 1 8 1 data bus
  31 I / O 2 8 2 data bus
  32 I / O 3 8 3 data bus
  33/34/35 air feet
  36,
  37 VCC power supply
  38/39/40 air feet
  41 I / O 4 8 4 data bus
  42 I / O 5 8 5 data bus
  43 I / O 6 8 6 data bus
  44 I / O 7 8 7 data bus
  45/46/47/48 air feet