Delta MS210 User Manual download pdf (Page 19)

MS210

MS210 DS004 www.mshinetek.com

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The above information is the exclusive intellectual property of M-Shine Technologies Corporation and shall not be disclosed, distributed without permission

rom M-

hine.

SPI Flash Recording Flow

When RECE or RECL pressed, MS210 de-bounce the key for around 30

ms, and will beep

for 0.2

second. After another 0.3 second, MS210 will start recording.

While BEEP, MS210 will give “wake up” command to SPI Flash. After 0.5 second

, the ADPCM Coder will

keep write to RAM every 1/4000 second, and MS210 will start give the following command to the SPI Flash.

1. Unprotect. Some SPI flash will be protected after power ON. MS210 will unprotect it.

2. Sector Erase.

3. Send program command, with data read from the FIFO RAM.

4. If a page is full, it will wait FLASH to write the data.

5. If a new sector is required, it will go to step 1.

6. If FIFO is empty it will wait for the data.

7. If edge triggered recording, it will stop recording when any key pressed.

8. If RECL is low, it will stop recording when it released.

That is, the timing is like Figure 12.

DEB

BEEP 0.2 SEC SILENCE 0.3S

WKUP

SPI Commands:

RECE or RECL

Unprotect Erase

Start Recording …

Program…

De-bounce 30ms

Wait 0.5 seconds for

Recording signal stable

TIME

Figure 12. Operations when recording starts.

When sample rate is 8 KHz, it will de-bounce for 30 ms. If sample rate is 16 KHz, it will de-bounce for 15 ms, etc.

If BEEPEN is short to GND, MS210 will just keep silence at the following 0.3 seconds.

If RECL is released in 0.5 second, no data will be stored to SPI Flash, and old data on Flash will be kept.

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