REAL-TIME CLOCK RF5C62
The RP/RF/
RS5C62 are CMOS LSIs which serve microcomputers as real-time clocks providing time, calendar,
and alarm functions in direct coupling with the data buses of CPUs such as 8086 and 68000. A built-in timer counter
acts as a watchdog timer or interrupt timer. They are available in three different types of packages: the DIP type,
the SOP type, and the SSOP type.
Configuration of Oscillatory Circuit
Typical external components:
X'tal : 32.768 kHz
R1² 35k½
CG=5pF to 35pF
CD=5pF to 35pF
Standard values of internal elements:
RF=12M½
RD=60k½
In the oscillatory circuit, which is driven by a constant voltage of about 2V relative to the VDD pin, either one end
of the oscillatory capacitors CG and CD must be connected to the VDD pin without exception.
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