Features: 3-bit or 4-bit ADPCM
Built-in 12-bit AD converter
Built-in12-bit DA converter
Built-in microphone amplifier
Built-in low-pass filter
Attenuation characteristics 40 dB/oct
External memories
Serial registers, 32M bits maximum (for variable messages)
8M bit serial register (MSM6685) can be driven directly
Serial voice ROMs, 4M bits maximum (for fixed messages)
1M bit serial voice ROM (MSM6595A) can be driven directly
2M bit serial voice ROM (MSM6596A) can be driven directly
3M bit serial voice ROM (MSM6597A) can be driven directly
Sampling frequency
4.0 kHz, 5.3 kHz, 6.4 kHz or 8.0 kHz (master clock frequency = 4.096 MHz)
8.0 kHz, 10.6 kHz, 12.8 kHz, or 16.0 kHz (master clock frequency = 8.192 MHz)
Number of phrases
63 phrases for variable messages
63 phrases for fixed messages
Maximum recording time (when external 32M bit RAM is connected)
34 minutes (for 16 kbps ADPCM)
23 minutes (for 24 kbps ADPCM)
17 minutes (for 32 kbps ADPCM)
Voice triggered starting function
Pause function
Master clock frequency: 4.096 MHz~8.192 MHz
Power supply voltage: Single 5 V power supply
Package:
56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name: MSM6688GS-2K)
Pinout
Specifications
|
Parameter |
Symbol |
Condition |
Rating |
Unit |
|
Power supply voltage |
VDD |
Ta = 25 |
0.3 to +7.0 |
V |
|
InputVoltage |
VIN |
Ta = 25 |
0.3 to VDD+0.3 |
V |
|
Storage temperature |
TSTG |
- |
55 to +150 |
|
DescriptionThe MSM6688/6688L is a "solid-state recorder" IC developed using the ADPCM method. Byexternally connecting a microphone, a speaker, a speaker drive amplifier, and a dedicated registero store ADPCM data, it can record and play back voice data in a manner similar to a tape recorder.The MSM6688 supports 5 V operation and has a stand-alone mode and a microcontroller interfacemode.
The MSM6688L supports 3 V operation and controls recording/playback in microcontroller interfacemode.
In the stand-alone mode, recording/playback conditions can be selected by pins and the MSM6688/6688L can be controlled by a simple drive timing. In the microcontroller interface mode, recording/playback can be controlled by commands from the microcontroller. In the microcontroller interfacemode, the MSM6688/6688L is much more flexible than in the stand-alone mode.
In addition, the MSM6688/6688L can form easily a recording and playback circuit with fixedmessages by connecting serial registers and serial voice ROMs as external memories.
Note: This data sheet explains a stand-alone mode and a microcontroller interface mode, separately.
MSM6688 Data Sheet
