公开(公告)号：JPH07152449A

公开(公告)日：1995-06-16

申请号：JP22433694

申请日：1994-09-20

Applicant: ADVANCED MICRO DEVICES INC

Inventor： DAGURASU DEII GEFUAATO ,  KERII EMU HOOTON ,  RITA OBURAIEN ,  JIEIMUZU AARU MAKUDONARUDO

IPC: G06F13/42 ,  G06F1/04 ,  G06F1/32 ,  G06F13/364

Abstract: PURPOSE: To provide a system and a method for controlling peripheral bus clock signals. CONSTITUTION: Before the stoppage of the peripheral bus clock signals, indicator signals are generated by a clock control circuit (120). A slave device generates clock request signals when the peripheral bus clock signals are kept requested. The clock control circuit receives them and prevents the peripheral bus clock signals from being stopped. When an alternate bus master (108; 110) requires the control of a peripheral bus (102) in stopping the peripheral bus clock signals, the alternate bus master can be constituted so as to assert the clock request signals for the restart of the peripheral bus clocks. The signals are sent to the peripheral bus and the clock control circuit receives them and restarts the peripheral bus clock signals. The alternate bus master can generate bus request signals synchronized with the peripheral bus clock signals so as to obtain enabling signals from a bus arbiter unit (106).