Global patent index - EP 1086466 A1

EP 1086466 A1 2001-03-28 - MICROCONTROLLER HAVING WRITE ENABLE BIT

Title (en)

MICROCONTROLLER HAVING WRITE ENABLE BIT

Title (de)

MIKROKONTROLLER MIT SCHREIBFREIGABEBIT

Title (fr)

MICROCONTROLEUR A BIT DE VALIDATION D'ECRITURE

Publication

EP 1086466 A1 (EN)

Application

EP 00917817 A

Priority

  • US 0006165 W
  • US 26470799 A

Abstract (en)

[origin: WO0054282A1] A microcontroller having a memory programmable in user mode. The microcontroller contains circuitry for detecting whether a programming level voltage has been activated. Also included is a Longwrite enable register containing an enable bit for enabling/disabling programming of the memory. When the register contains the bit indicating programming as enabled, and the programming level voltage is detected, the microcontroller allows the program memory to be programmed. The programming can take place in user mode. The programming level voltage signal is also used to detect whether to enter into a test mode. Programming of the program memory is also possible in the test mode. The invention is also directed to a method for operating a microcontroller for controlling programming of the program memory. The microcontroller according to the invention allows increased functionality by detecting whether to enter the test mode without the requirement of a test mode select input signal.

IPC 1-7 (main, further and additional classification)

G11C 16/22; G06F 1/22; G11C 29/00

IPC 8 full level (invention and additional information)

G06F 15/78 (2006.01); G06F 9/24 (2006.01); G06F 9/30 (2006.01); G11C 16/22 (2006.01)

CPC (invention and additional information)

G11C 16/225 (2013.01); G06F 9/24 (2013.01); G06F 9/30101 (2013.01); G11C 16/22 (2013.01)

Citation (search report)

See references of WO 0054282A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0054282 A1 20000914; CN 1300432 A 20010620; EP 1086466 A1 20010328; JP 2002539542 A 20021119; TW 490670 B 20020611

INPADOC legal status

2006-04-12 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20051001

2001-03-28 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20001106

2001-03-28 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE