GENERAL DESCRIPTION
The MSM6422 is a low-power, single-chip device implemented in complementary metal-oxide semiconductor technology.
The MSM6422 can be used in place of logic ICs configured around a main CPU, or for small-scale systems such as home electronic equipment.

FEATURES
• ROM : 2048 words x 8 bits
• RAM : 64 words x 4 bits
• I/O port
    Input-output port : 4 ports x 4 bits (pseudo bidirectional configuration)
                                 1 port x 2 bits (pseudo bidirectional configuration)
    Input port : 1 port x 1 bit (combined use with an interrupt input)
• Instructions : 63
• Two interrupt sources (1 internal, 1 external)
• Power down features
• Minimum instruction execution time : 952 ns @ 4.2 MHz clock
• Crystal and ceramic oscillation
• Single 5 V power supply
• Package options:
    24-pin plastic DIP (DIP24-P-600-2.54) : (Product name : MSM6422-xxRS)
    24-pin plastic SOP (SOP24-P-430-1.27-K) : (Product name : MSM6422-xxGS-K)
                                                                           xx indicates a code number.