OKI Semiconductor
FEDL6650FULL-06
Issue Date: May 30, 2002
MSM6652/53/54/55/56-xxx, MSM6652A/53A/54A/55A/56A/58A-xxx, MSM66P56-xx,
MSM6650
Internal Mask ROM Voice Synthesis IC, Internal One-Time-Programmable (OTP) ROM Voice Synthesis IC,
External ROM Drive Voice Synthesis IC
GENERAL DESCRIPTION
The MSM6650 family is the successor to OKI’s MSM6375 family. To ensure high-quality voice synthesis, the
MSM6650 family members offer adaptive differential pulse-code modulation (ADPCM) playback, pulse-code
modulation (PCM) playback, 12-bit D/A conversion, and on-chip –40 dB/octave low-pass filter (LPF).
The conventional “beep” tones and 2-channel playback are now easier to use. OKI has added additional functions
such as melody play, fade-out, and random playback. OKI has improved external control by adding an Phrase
Control Table functioin. The Phrase Control Table function can be used to form sentences by linking phrases.
The MSM6650 family members can support a variety of applications as it can function in either Standalone Mode
or Microcontroller Interface Mode. In Microcontroller Interface Mode, serial input control is available. Serial
input control minimizes the number of microcontroller port pins required for voice synthesis control. The
MSM6650 family includes an internal mask ROM version, internal one-time-programmable (OTP) ROM version,
and external ROM version. The features of the MSM6650 family devices are as follows.
• MSM6652/53/54/55/56-xxx
These devices are single-chip voice synthesizers with an on-chip mask ROM using the CMOS technology.
Standalone Mode or Microcontroller Interface Mode can be selected by mask option.
These have already been obsolete devices. We recommend A version when you design in your new products as
bellows.
• MSM6652A/53A/54A/55A/56A/58A-xxx
The trial production period for these devices is shorter than those described above. These devices are suitable for
new products.
• MSM66P56-xx
The device is a single-chip CMOS voice synthesizer with one-time-programmable (OTP) ROM.
Standalone and Microcontroller Interface Modes are selected by using a code (01-04).
The user can easily write voice data using the development tool AR204,AR205. Unlike the mask ROM version,
the OTP version is suited to applications which requires a small lot production of different type devices or short
delivery time.
• MSM6650
The MSM6650 device can directly connect external ROM or EPROM of up to 64 Mbits, which stores voice data.
This device is ideally suited to an evaluation IC for the MSM6650 family because its circuit configuration is
identical to those of the mask ROM-based and OTP version devices.
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