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Patent Searching and Data


Title:
MONITOR CONTROL CIRCUIT AND COMMUNICATION EQUIPMENT EMPLOYING IT
Document Type and Number:
Japanese Patent JP3451418
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To prevent malfunction due to difference of output voltage drop characteristics at an onboard power supply section by detecting an input voltage dropping below a set level and stopping the polling for collecting the mounting state of each package at a polling control section.
SOLUTION: A voltage monitoring section 3 detects the input voltage Vin from a power supply section to an onbard power supply section 1 dropping below a set level and delivers a voltage drop detection signal to a control section 4. Upon receiving the voltage drop detection signal or an interruption detection alarm signal FALM due to blown-out of fuse at the power supply section, the control section 4 controls any one or a plurality of a polling control section 5, a mounting state collecting section 6 and a CPU application section 7 such that the polling is interrupted. According to the arrangement, incorrect recognition of non-mounted package can be prevented by stopping the polling immediately even it the operable interval is different due to different output voltage drop characteristics at the onboard power supply section 1.


Inventors:
Onuma, Kazuhiro
Hayakawa, Yukihiro
Application Number:
JP1997000181191
Publication Date:
September 29, 2003
Filing Date:
July 07, 1997
Export Citation:
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Assignee:
FUJITSU LTD
International Classes:
H02H3/24; (IPC1-7): H02H3/24
Attorney, Agent or Firm:
柏谷 昭司 (外2名)