I / O connection 4bit real-time clock module

● Built-in crystal oscillator, non-adjustable and rationalized
● Cow of time (hours, minutes, seconds), calendar (year, month, day, day of the week) Built-in
● 12H / 24H switching and leap year automatic setting
● Reference signal output, 1024Hz, 1 second, 60 seconds, 1 hour can be set
● With counter start / stop and reset functions
● DATA uses a 4-bit bidirectional bus line and uses a memory method. Execute write / read
● C-MOS IC with low current consumption and backup function
● MSM58321RS and pin and function compatible

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