公开(公告)号：JPH08194663A

公开(公告)日：1996-07-30

申请号：JP23134895

申请日：1995-09-08

Applicant: ADVANCED MICRO DEVICES INC

Inventor： SHIYAAMAN RII ,  MAIKERU TEII WAIZAA

IPC: G06F13/36 ,  G06F1/32

Abstract: PROBLEM TO BE SOLVED: To provide a system for automatically judging whether or not clock run characteristics for saving power can be supported and performing activation or inactivation. SOLUTION: This system 100 is provided with a bus interface and arbiter unit 106 and it is provided with a clock control circuit 120 for turning ON/OFF a clock generator 122 for generating bus clock control signals and status and command registers 142 and 144. The system 100 is further provided with a peripheral bus master and a slave device 108 and 118 and they are respectively provided with the status and command registers 242 and 244 as well. The respective status and command registers are respectively provided with exclusive bits for providing information relating to whether or not the clock run characteristics can be supported inside the system.

公开(公告)号：JPH07302133A

公开(公告)日：1995-11-14

申请号：JP1226295

申请日：1995-01-30

Applicant: ADVANCED MICRO DEVICES INC

Inventor： MAIKERU TEII WAIZAA ,  RITA EMU OBURAIEN

IPC: G06F1/04 ,  G06F1/32

Abstract: PURPOSE: To provide a power management system optimizing the power management in a computer system using an integrated processor. CONSTITUTION: When the computer system is reset, the power management unit 208 enters a ready state at which a CPU clock signal and a system clock signal are driven at the maximum frequency. When a primary activity is not detected within a time, the power management unit transits from the ready state, to a pause state where a frequency of the CPU clock signal is reduced, a standby state where the CPU clock signal is stopped, and a holding state where both the CPU clock signal and the system clock signal are stopped and power supply to selected circuit sections is stopped continuously. When a secondary activity is detected in the pause state or the ready state, the power management unit enters a transient state where both the CPU clock signal and the system clock signal are driven at a maximum frequency for a predetermined time.

公开(公告)号：JPH08180013A

公开(公告)日：1996-07-12

申请号：JP23382795

申请日：1995-09-12

Applicant: ADVANCED MICRO DEVICES INC

Inventor： SHIYAAMAN RII ,  MAIKERU TEII WAIZAA

IPC: G06F13/36 ,  G06F1/08 ,  G06F13/42

Abstract: PROBLEM TO BE SOLVED: To provide a system for promoting the operation at a higher clock frequency of a peripheral bus such as a PCI bus. SOLUTION: An enable line (66MHzENABLE) is connected to respective devices 70 and 80 present on the PCI bus 100. When all the devices can perform a high frequency operation (66MHz, for instance,) the enable line is pulled up through a pull-up register 62. For the device incapable of the high frequency operation, at the time of corresponding to specifications in an industrial field at present, the enable line is connected to the ground in the inside. Thus, the enable line is asserted in the case that all the PCI devices 70 and 80 support the high frequency operation but it is de-asserted otherwise. An exclusive state bit for making the system alarm non-matching between the device and bus ability can be provided and a configuration register can be automatically reconstituted when the parameter of the system is changed.

公开(公告)号：JPH0836445A

公开(公告)日：1996-02-06

申请号：JP1226195

申请日：1995-01-30

Applicant: ADVANCED MICRO DEVICES INC

Inventor： MAIKERU TEII WAIZAA ,  RITA EMU OBURAIEN

IPC: G06F1/04 ,  G06F1/32

Abstract: PURPOSE: To provide a power managing unit in which the power consumption amounts of the overall system can be minimized, even when malfunctioning software is loaded in a computer system. CONSTITUTION: A power control unit 122 and a clock control unit 124 are respectively constituted, dependent on the state of a power managing unit 120, so that a power can be applied or removed to or from a certain specific component in a computer system, and the frequencies of both a CPU clock signal and a system clock signal can be increased or decreased. The power managing unit 120 includes a software constitution enabling state register 136 for allowing system softward, such as software for an advanced power management(APM) in a system BIOS to control the state of the power managing unit. Therefore, the AMP software is applied for controlling the state of the power managing unit.