MSM6656A

Note: Actual voice ROM area is smaller by 22 Kbits.

• 4-bit ADPCM or 8-bit PCM sound generation
• Melody function
• Edit ROM function
• Two-channel mixing function
• Built-in random playback function
• Fade-out function via four-step sound volume attenuation
• Built-in beep tone of 0.5 kHz, 1.0 kHz, 1.3 kHz, or 2.0 kHz selectable with a specific code
• Sampling frequency of 4.0 kHz, 5.3 kHz, 6.4 kHz, 8.0 kHz, 10.6 kHz, 12.8 kHz, 16.0 kHz, or 32.0 kHz
   (32 kHz sampling is not possible when using RC oscillation)
• Up to 120 phrases
• Built-in 12-bit D/A converter
• Built-in 40 dB/octave low-pass filter
• Standby function
• Selectable RC or ceramic oscillation
• Package options:
     18-pin plastic DIP (DIP18-P-300-2.54) (Product name: MSM6652-xxxRS/MSM6653-xxxRS/
                                                                                          MSM6654-xxxRS/MSM6655-xxxRS/
                                                                                          MSM6656-xxxRS/MSM6652A-xxxRS/
                                                                                          MSM6653A-xxxRS/MSM6654A-xxxRS/
                                                                                          MSM6655A-xxxRS/MSM6656A-xxxRS/
                                                                                          MSM6658A-xxxRS)
24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name: MSM6652-xxxGS-K/MSM6653-xxxGS-K
                                                                                           MSM6654-xxxGS-K/MSM6655-xxxGS-K/
                                                                                           MSM6656-xxxGS-K/MSM6652A-xxxGS-K/
                                                                                           MSM6653A-xxxGS-K/MSM6654A-xxxGS-K/
                                                                                           MSM6655A-xxxGS-K/MSM6656A-xxxGS-K/
                                                                                           MSM6658A-xxxGS-K/MSM66P54-03GS-K/
                                                                                           MSM66P54-04GS-K/MSM66P56-03GS-K/
                                                                                           MSM66P56-04GS-K)
  20-pin plastic DIP (DIP20-P-300-2.54-W1) (Product name: MSM66P54-03RS/MSM66P54-04RS/
                                                                                              MSM66P56-03RS/MSM66P56-04RS)
  64-pin plastic QFP (QFP64-P-1420-1.00-BK) (Product name: MSM6650GS-BK)
  64-pin plastic SDIP (SDIP64-P-750-1.78) (Product name: MSM6650SS)

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 Edit ROM. The Edit ROM 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.
• MSM6656A

  The trial production period for these MSM6656A is shorter than those described above. These devices are suitable for developing prototype models and concept demonstration of new products.
•MSM66P54-xx, 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 AR761 or AR762, or P54 adapter.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.