Atmel AT89C51SND1C User Manual page 18

Operating Description
3.6.3 Message Recording
3.6.4 Message Erasing
3.6.5 Memory Selection
3.6.6 Message
Player/Recorder
State
3.6.7 Message Name
3.6.8 Playing Time
3.6.9 Volume Control
3-16
4209A–MP3–12/02
Key
Pressing the "Record" key, creates a new "Voicexxx.wav" file in FAT then sampling is
started and message is recorded until the "Stop" key is pressed or end of memory is
reached. Up to 255 voice messages can be recorded in FAT.
Pressing the "Erase" key, for more than 3 seconds, erases the currently selected
message.
The memory selection is done using the "Memory control" key. On-board memory is
selected by default, pressing the "Memory control" key selects sequentially the MMC1
memory, the MMC2 memory then the on-board memory. If present, selected memory is
displayed as shown in Table 2.
The voice player/recorder can take 5 different states as detailed in Table 6.
Table 6. Voice Player States
Icon
When entering voice operating mode or after selecting other memory, the wave file
name is displayed. If the root directory of the on-board memory does not contain any
"VOICEnnn.WAV" file, '--' is displayed instead of the file name.
If memory is not formatted, the error state is displayed.
During memo playing, time is displayed as minute:second.
A five step volume control is implemented and is adjusted by pressing the "Increase" or
"Decrease" key.
Description
Record (stop state)
Start recording of a new voice message.
Erase (stop state)
Pressing this key for more than 3 seconds removes the selected voice
message from FAT.
Keypad Lock Control
Lock or unlock the keypad.
Description
STOP
No message under playing nor recording.
PLAY
Message is under playing.
PAUSE
Playing or recording is paused.
RECORD
Message is under recording.
ERROR
Selected memory is not formatted.
Firmware Package User Guide