EP 1240583 A2 20020918 - DUAL-MODE PROCESSOR
Title (en)
DUAL-MODE PROCESSOR
Title (de)
DUAL-MODUS-PROZESSOR
Title (fr)
PROCESSEUR BIMODAL
Publication
Application
Priority
- US 0034458 W 20001219
- US 47175499 A 19991223
Abstract (en)
[origin: WO0146800A2] A multiple-mode processing circuit, such as a dual-mode processor (5), operates in at least first and second modes according to a switch (10). When a mode is active, data transfer between the processor and a respective memory occurs. Thus, instructions from the memory can be executed at the processor, and the results can be stored in the respective memory. For example, first and second memories (14, 54) may be provided for the first and second modes (10, 50), respectively. The memories are separate, and no data transfer can occur between the memories directly or via the processor. The first mode (10) may be a secure mode for secure processing operations, such as providing conditional access for television programming services at a set-top subscriber terminal. The second mode (50) may be a non-secure mode, such as for providing any other application at the terminal, e.g., program guide, shop at home service, etc. In one embodiment, a data bus is provided for time-multiplexed transfer of data between the processor and the respective memories. In another embodiment, switching of individual internal registers and external elements such as address and data latches, is provided.
IPC 1-7
IPC 8 full level
G06F 9/30 (2006.01); G06F 9/318 (2006.01); G06F 9/38 (2006.01); G06F 9/46 (2006.01); G06F 9/52 (2006.01); G06F 12/14 (2006.01); G06F 21/00 (2006.01); G06F 21/02 (2006.01); G06F 21/71 (2013.01); G06F 21/74 (2013.01); G06F 21/79 (2013.01)
CPC (source: EP KR)
G06F 9/00 (2013.01 - KR); G06F 9/3012 (2013.01 - EP); G06F 9/30123 (2013.01 - EP); G06F 9/30189 (2013.01 - EP); G06F 9/3851 (2013.01 - EP); G06F 12/1433 (2013.01 - EP); G06F 21/71 (2013.01 - EP); G06F 21/74 (2013.01 - EP); G06F 21/79 (2013.01 - EP); G06F 2221/2105 (2013.01 - EP)
Citation (search report)
See references of WO 0146800A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0146800 A2 20010628; WO 0146800 A3 20020725; AU 2278601 A 20010703; CA 2395645 A1 20010628; CN 1425157 A 20030618; EP 1240583 A2 20020918; JP 2003518287 A 20030603; KR 20020091061 A 20021205; MX PA02006214 A 20030128; TW 541466 B 20030711
DOCDB simple family (application)
US 0034458 W 20001219; AU 2278601 A 20001219; CA 2395645 A 20001219; CN 00818611 A 20001219; EP 00986569 A 20001219; JP 2001547248 A 20001219; KR 20027007955 A 20020620; MX PA02006214 A 20001219; TW 89127713 A 20001222