MSM6789A/6789L SBC Solid-State Recorder IC

The MSM6789A MSM6789L , an improved version of MSM6788, is a solid-state recorder developed using the Sub Band Coding (SBC) method. Just like MSM6788, the MSM6789A MSM6789L has a stand-alone mode and a microcontroller-interface mode. In the stand-alone mode, record/playback conditions CAN be selected from pins and the MSM6789A MSM6789L CAN be controlled by a simple drive Timing In the microcontroller-interface mode, record/playback CAN be controlled by commands from the Microcontroller and more functions are available than in the stand-alone mode. The MSM6789A MSM6789L CAN directly drive serial voice ROM as external memory as well as serial Register or general-purpose DRAM* (1-bit x or 4-bit x type selectable) as external Memories which allows a recording and playback circuit with fixed messages to be built easily. The method from Microcontroller is the same as the MSM6788. * Only for MSM6789A br /> By Oki Semiconductor