sdram data access circuit and sdram data access system

Abstract

The invention provides an SDRAM (synchronous dynamic random access memory) data access circuit and an SDRAM data access system. The SDRAM data access circuit comprises a control circuit, a control signal interface and a data address interface, wherein the control circuit is connected with the control signal interface and is connected with an SDRAM control interface through the control signal interface, and the control circuit is connected with the data address interface and is simultaneously connected with an SDRAM address interface and the data interface through the data address interface. Address signals and data signals are respectively transmitted to an SDRAM through the data address interface, so the data access circuit is only provided with one data address interface, and the SDRAM data access operation can be realized. Therefore, the interface number of the data access circuit can be reduced, the hardware structure of the circuit is simplified, the requirements of small area and low cost of the circuit are met, and the circuit and the system are particularly suitable for small-volume and small-encapsulation electronic products.

Description

technical field [0001] The present invention relates to the technical field of SDRAM (Synchronous Dynamic Random Access Memory, Synchronous Dynamic Random Access Memory) data access, in particular to an SDRAM data access circuit and an SDRAM data access system. Background technique [0002] see figure 1 Shown is a structural block diagram of an existing SDRAM data access circuit. The existing data access circuit 100 of SDRAM has a control interface, such as / CS, / RAS, / CAS, / WE, etc., and transmits the control signal of the data access circuit 100 to the SDRAM through several control lines 110 102. In addition, the original data exchange circuit 100 also has an address interface and a data interface. The address signal of the data access circuit 100 is transmitted to the SDRAM 102 through the address line 120 respectively, and the data interface and data interface of the data access circuit 100 are transmitted through the data line 130. Transfer to SDRAM 102. Generally s...

AI Technical Summary

Problems solved by technology

In this way, for data access circuits that require small area and low cost, it will become difficult to integrate too many interface pins

Images