The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2004
Filed:
Nov. 04, 2002
Kuan-Chou Chen, Chia Li, TW;
Mediatek Inc., Hsinchu, TW;
Abstract
A memory access interface for connecting a memory to a micro-controller having an address/data multiplexing bus and a microprocessor is proposed. The memory access interface includes an address latch, a multiplexer, and a data buffer. The address latch latches and outputs the lower-bit address signal on the address/data multiplexing bus of the micro-controller when an address-latch-enable signal is enabled. The multiplexer receives the lower-bit address signal latched by the address latch, a higher-bit address signal outputted from the micro-controller, and an address signal outputted from the microprocessor and selectively outputs the address signal of the micro-controller or the address signal of the microprocessor as the address signal of the memory according to a first control signal. The data buffer transmits the signal of the data bus of the memory to the address/data multiplexing bus of the micro-controller during a data cycle of the micro-controller, and maintains a high impedance state during an address cycle of the micro-controller.