Atmel AT89C51SND1 Section 3 Overview of Modes

AT89C51SND1 Reference Design User Guide 3-8

Rev. 4207B–MP3–04/07

Section 3Overview of Modes

This mode will allow users to listen to the MP3 song stored in the emb edded mass stor-

age system. If the memory is empty, LED n°1 does not blin k and there is no music. If

there are valid MP3 files in the memory, the player w ill play the first song and LED n°1

blinks slowly.

Main and alternate functions give access to standard player functions.

When entering Voice Mode, the first wav file in the directory will be selected and played.

When the player reaches the end of a wav file, or if wav file is not present, the player will

switch to record mode: LED n °2 blinks quickly. If the button Play/Pause is pressed, th e

player records voices from the microphone. If the Function button is pre ssed, the player

will go back to its initial state (Voice Mode selected).

The microphone will record the voice and store it in the se lected file until the maximum

size of the wav file is reache d. When the maxi mum size is reac hed, the player will go

back to its initial state.

This mode w ill allow use rs to connect the player to a PC r unning under Linux

, Win-

dows

2000/XP/Me and MacO S

9 (without driver) or Windows 98 (with a driver). The

Data Storage Flash w ill then be seen as a removable disk d rive and copying from any

PC storage media to the player memory will be possible. Current firmware does not sup-

port Windows Format function.

Prior to entering this mode, a USB cable has to be conn ected between the PC and the

player. The player will then be powere d by the USB supply. When entering U SB mode,

USB lines will be activated and a device will appear in the Hardware window of the PC.

Note: First connection may require the driver installation depending of your Operating

System.

When connected, LED n°3 blinks quickly. When a file is moved to the player, this LED

does not blink regularly. Transfer is completed when the LED continues to bli nk quickly

and regularly.

Note: The file will appear in the removable media window on the PC before the end of

the transfer (almost at the beginning!).

Do not disconnect the cable during an on-going transfer.