Circuit allowing insertion/extraction of a board in a system during normal operation
AssigneeSamsung Electronics Co., Ltd.
InventorDong-Hyun Park
Life of this patent
Estimating the term…
Abstract
This invention relates to a circuit allowing insertion and extraction of a board in the system during normal operation. The circuit includes a monitoring circuit detecting the voltage of the board itself, a bilateral buffer and a means to enable and disable bilateral buffer according to the output of the monitoring circuit. In the circuit, when the detected voltage is over a predetermined level, board reset timing is regulated variably so as for the board to reset normally prior to enabling the buffer.
Claims10
A circuit allowing insertion and extraction of a board in a system during normal operation, the circuit comprising:
- a monitoring circuit, said monitoring circuit detecting a voltage of the board and providing a signal when the voltage is at least equal to a predetermined value;
- a bilateral buffer, said buffer being interposed in a signal line between the system and the board;
- means to enable or disable said bilateral buffer according to the signal of said monitoring circuit, said buffer being disabled when the voltage is below a predetermined value;
- and
- a reset timing circuit, said reset timing circuit being responsive to said signal from said monitoring circuit, wherein when said detected voltage exceeds said predetermined level, said reset timing circuit is initialized maintaining the board in a reset state and maintaining said bilateral buffer in said disabled state for a predetermined time.
A circuit for maintaining system reliability while inserting and extracting boards from a system, the circuit comprising:
- means for monitoring a voltage of a board during insertion and extraction;
- means for placing signal lines between the board and the system in a disabled state when the voltage is below a predetermined threshold value;
- means for maintaining said disabled state for a predetermined time after the voltage is at least equal to the predetermined threshold value;
- and
- means for generating a reset signal, said reset signal being held in a reset state until the expiration of said predetermined time.
A method for maintaining system reliability while inserting and extracting boards from a system, the method comprising the steps of:
- monitoring a voltage of a board;
- disabling signal lines between the board and the system when the voltage is below a predetermined threshold value;
- maintaining said disabling for a predetermined time after the voltage is at least equal to the predetermined threshold value;
- and
- generating a reset signal when the voltage is equal to the predetermined threshold value and maintaining the reset signal for the predetermined time.
Dependencies are inferred from the claim text.