公开(公告)号：JPH11120118A

公开(公告)日：1999-04-30

申请号：JP21473798

申请日：1998-06-24

Applicant: MICROCHIP TECH INC

Inventor： DAY JOHN ,  JOHN NATHAN ,  NEGLEY BRUCE ,  POULIN SHANNON

IPC: G06F13/14 ,  G06F12/06 ,  G06F13/38 ,  G06F13/42

Abstract: PROBLEM TO BE SOLVED: To enable plural circuit boards to flexibly perform multiple connection to a serial bus. SOLUTION: An original software address must be allocated to each circuit board 12 before the board 12 can be used together with other circuit boards on a common serial bus 18. The original software address is allocated when a bus master device 20 outputs an address allocation command and the command utilizes an original serial number that is stored in each board 12. This address allocation command inquires each board 12 which is connected to the bus 18 and allocates an original software address to each board 12 which responds completely. An address allocation command is repeatedly issued to each board 12 on the bus 18 until the original software address is allocated to all of the boards 12 on the bus 18.