Static information storage and retrieval – Powering
Patent
1997-04-07
1999-05-04
Hoang, Huan
Static information storage and retrieval
Powering
365229, 36523003, 365201, G11C 700
Patent
active
059011033
ABSTRACT:
An integrated circuit (10) contains a central processing unit (CPU) (12) and a plurality of memory blocks (26-34) configured into one or more banks of memory. A plurality of power control switches (38-42) are used to dynamically select which of a plurality of external voltage supply signals are provided to power each of the memory blocks (26-34). The power control switches (38-42) may be configured from software via writing the data to a register (24) or can be enabled by test control circuitry (22) or can be automatically enabled in response to VDD power voltage failure. In addition, an intelligent controller can dynamically control the switches in response to execution flow of data accesses and instruction fetches from the memory banks so that only currently accessed memory banks or recently accessed memory banks are activated at a high power level while all other memory banks are in a low power stand-by mode.
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Joseph M. Harris II et al., Motorola Inc., "Method and Apparatus for Testing On-Chip Memory on a Microcontroller", Application No. 08/669,863, Filed Jun. 10, 1996.
Dunn John P.
Freund Theo C.
Harris, II Joseph M.
Nash James C.
Cooper Kent J.
Hoang Huan
Motorola Inc.
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