GENERAL DESCRIPTION
The MSM6352 is a high-performance 4-bit microcontroller employing complementary metal oxide semiconductor technology. The use of this device for a repertory telephone, which employed a conventional microcomputer that was difficult to be configured in a single-chip device, allows a compact and high-performance telephone set to be monufactured easily.

FEATURES
• Lower power consumption
• Mask ROM : 2048 x 14 bits
• ROM : 640 x 4 bits
• I/O port
    Input-output port : 1 port x 4 bits
    Input port : 3 ports x 4 bits
    Output port : 3 ports x 4 bits
• DTMF generator
• Built-in programmable timer
    Applicable for dial pulse output
    (Positive phase/negative phase, 34%/40%, 10 pps/20 pps selectable)
• Watch dog timer
• Stack : 5 Level
• Power down by STOP instruction
• Instructions useful for data management (data search and block data transfer)
• Operating voltage : 2.0 to 5.5V (2.2 to 5.5V in Tone mode)
• 3.58 MHz oscillator
• Instruciton execution time :17.9 ms
• Package options:
    28-pin plastic DIP (DIP28-P-600-2.54) : (Product name: MSM6352-xxRS)
    40-pin plastic DIP (DIP40-P-600-2.54) : (Product name: MSM6352-xxRS)
    42-pin plastic shrink DIP (SDIP42-P-600-1.78) : (Product name: MSM6352-xxSS)
    44-pin plastic QFP (QFP44-P-910-0.80-K) : (Product name: MSM6352-xxGS-K)
    44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name: MSM6352-xxGS-2K)
                                                                              xx indicates the code number.