Semiconductor
MSM9888L
1/14
Flash-driving Recording and Playback IC
GENERAL DESCRIPTION
The MSM 9888L is a recording and playback IC that is controlled by the micro-controller in serial
mode, compresses voice with the Oki ADPCM system with high tone quality, and directly stores
voice data inthe serial voice flash momory. This IC can operate in a range of 2.7 to 3.6 V and
contains a mask ROM. Since the package is small and backup is not needed, this recording and
playback IC is suitable for the voice system such as handy terminals.
FEATURES
Voice analyzing and synthesizing system
: 4-bit OKI ADPCM system
8-bit OKI non-linear PCM system
(for ROM playback only)
Built-in 12-bit A/D
D/A converter
Built-in LPF
Sampling frequency (for 4.096 MHz of source oscillation frequency)
: 2.0 kHz, 2.7 kHz, 3.2kHz, 4.0 kHz, 5.3 kHz, 6.4 kHz, 8 kHz
External memory for variable message
: 1Mb, 2Mb, 4Mb, 8Mb, serial voice flash memory
Recording time (When the 1Mb serial voice flash is used)
: Approximately 32 seconds (Fsam=8.0 kHz)
: Approximately 40 seconds (Fsam=6.4 kHz)
: Approximately 65 seconds (Fsam=4.0 kHz)
Built-in 512Kb mask ROM for fixed message
Playback time for fixed message
: Approximately 15 seconds (Fsam=8.0 kHz)
: Approximately 20 seconds (Fsam=6.4 kHz)
: Approximately 31 seconds (Fsam=4.0 kHz)
Number of pharase
Variable message
: 63 phrases
Fixed message
: 255 phrases
Any data can be written to and read from a part in the voice flash memory.
Serial microcontroller interface
Source oscillation frequency
: 4 MHz to 6 MHz
Supply voltage
: 2.7 V to 3.6 V
Operating temperature
: –10
°
C to 70
°
C
Package :
30-pin plastic SSOP (SSOP30-P-56-0.65-K)(Product name : MSM9888LGS-AK)
: Attenuation rate –40 dB/oct
E2D0083-27-44
Peimnay
This version: Jan. 1998
Previous version: May. 1997