SERIAL 4-WIRE
RX- 4045SA/NB
DC characteristic Timing operation Initial setting
Processing terminals Setting register Time and calendar
Access operation (READ/WRITE) Timer interrupting function Others
　
DC characteristic
　
Timing operation
Timing malfunction
Q Time data is not renewed upon retrieval of clock data and the same time is always indicated, resulting in the data not being counted up from the start time. What are the potential causes?
We are using the RX-4045NB.
A The internal quartz resonator may not be oscillating.

Potential causes are as follows:
-The metal end area (surrounded by a dotted circle) on the backside of the module is touching the substrate pattern, blocking the internal quartz resonator’s oscillation.
-The internal quartz resonator is damaged due to a sudden impact such as being dropped.
The clock will not move if the internal quartz resonator does not oscillate, so the clock data being retrieved stays the same.
　
Initial setting
　
Processing terminals
State of terminal
Q State of terminal What is the state of the D0 terminal while in the backup state?
A The terminal is in the state of high impedance.
　
Setting register
　
Time and calendar
　
Access operation (READ/WRITE)
Data accessing
Q Does the DI terminal accept an input signal when the CE terminal performs burst reading while the CE terminal holds "H"and data are output to the DO terminal?
A Input to the DI terminal is ineffective.
　
Timer interrupting function
　
Others