Memory management unit for digital signal processo

专利名称：Memory management unit for digital signal

processor

发明人：Wang, Bu-Chin,Daly, Marita E申请号：EP87301799.0申请日：19870302公开号：EP0245922A2公开日：19871119

摘要：A memory management unit suitable fo use in a digital signal processor havinginternal and eternal memories is described. The unit is especially designed to facilitatenumeric algorithms such as fast fourier transforms, auto-correlation and digital filteringby relieving the programmer from the need to monitor memory accesses. Automaticpost-updating of memory addresses is provided after indirect memory references. Also,memory boundary-checking is performed according to a user-specified modulus value,and a memory reference is automatically adjusted to fall within the user-specifiedaddress range. A dual-access register file stores initial memory addresses and theirassociated modulus values and in a dual-bus embodiment a pair of address generationunits provides post-updates of the addresses stored in the register files. Directaddressing of memory is also supported by the memory management unit and a pageregister internal to the unit allows the user to specify memory page information during adirect address operation.. A modulo-adjust portion of the address generation unitimplements any user-specified modulii in the range 0 to , as well as modulii of 128, 256and 512. A method of operating a memory management unit to provide the featuresobtained by the instant invention is also described.

申请人：ADVANCED MICRO DEVICES, INC.

地址：901 Thompson Place P.O. Box 3453 Sunnyvale, CA 94088 US

国籍：US

代理机构：Wright, Hugh Ronald

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