Real-time timepiece chip interface circuit control method and real-time timepiece control circuit

Abstract

The invention discloses a control method for a real-time clock chip interface circuit, a real-time clock circuit and a programmable logical circuit for the control of the real-time clock chip, wherein, the control method for the real-time clock chip interface circuit comprises the following procedures: procedure S102, wherein, a CPU system sends out the requests of reading / writing operation to a programmable logical device; and procedure S104, wherein, the programmable logical device performs reading or writing operation on the real-time clock chip according to requests received. Therefore, the invention significantly reduces the stress of CPU and saves a huge amount of time through a hardware-realizing mode, thereby not only improving the real-time performance of processing but also avoiding reading-writing conflicts.

Description

technical field

[0001] The invention relates to the field of electronic technology, and more specifically, to a control method of a real-time clock chip interface circuit, a real-time clock control circuit, and a programmable logic circuit for controlling the real-time clock chip. Background technique

[0002] In the field of electronic application design, the design of a real-time clock is required in many occasions as a time-based record or reference time for alarms or performance statistics, and its performance directly affects the quality of the entire system. A real-time clock often needs to meet the following conditions:

[0003] First, accurate online timing;

[0004] Second, more accurate timing can still be maintained within a period of time when the power is cut off;

[0005] Third, during the network operation, the operation of frequently reading the time will not cause too heavy load on the system.

[0006] The usual practice in the art is to use the I2C inter...

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