公开(公告)号：GB2264799B

公开(公告)日：1994-11-16

申请号：GB9305800

申请日：1993-03-19

Applicant: INTEL CORP

Inventor： REDDY CHANDRASHEKAR M ,  HIROSE SCOTT D ,  CHO SUNG-SOO ,  KARDACH JAMES P ,  FARRER STEVEN M ,  ROBERTS MEELING

IPC: G06F1/04 ,  G06F1/32 ,  G06F15/78 ,  G11C11/401 ,  G11C11/406

Abstract: A power suspend mode activates a slow DRAM refresh in a computer system with a limited source of power. The power suspend mode reduces the power consumed by the computer system while preserving the contents of memory. The cyclic refresh of DRAM using a slow refresh clock substantially reduces the power consumed while the computer is suspended. This technique is particularly useful for battery powered portable computer systems. When an external or internal condition causes the computer system to transition to a power down mode, an IO subsystem notifies the CPU which sets control bits in the IO subsystem and a video subsystem. The IO subsystem then begins to generate a slow DRAM refresh pulse. Once the CPU and video subsystem sense the power suspend mode activation, the system memory and video memory are refreshed using the slow refresh clock. The power consumed during the refresh process is thereby greatly reduced. When a resume signal is received by the IO subsystem, the slow refresh clock is terminated and the system memory and video memory are again refreshed using a normal faster clock.

公开(公告)号：GB2264799A

公开(公告)日：1993-09-08

申请号：GB9305800

申请日：1993-03-19

Applicant: INTEL CORP

Inventor： REDDY CHANDRASHEKAR M ,  HIROSE SCOTT D ,  CHO SUNG-SOO ,  KARDACH JAMES P ,  FARRER STEVEN M ,  ROBERTS MEELING

IPC: G06F1/04 ,  G06F1/32 ,  G06F15/78 ,  G11C11/401 ,  G11C11/406

Abstract: A power suspend mode activates a slow DRAM refresh in a computer system (10) with a limited source of power. The power suspend (100) mode reduces the power consumed by the computer system (10) while preserving the contents of memory. The cyclic refresh of DRAM (80) using a slow refresh clock substantially reduces the power consumed while the computer is suspended. This technique is particularly useful for battery powered portable computer systems. When an external or internal condition causes the computer system to transition to a power down mode, an IO subsystem (30) notifies the CPU (20) which sets control bits in the IO (30) subsystem and a video subsystem (40). The IO subsystem (30) then begins to generate a slow DRAM refresh pulse (91). Once the CPU (20) and video subsystem (40) sense the power suspend mode activation, the system memory (80) and video memory (50) are refreshed using the slow refresh clock. The power consumed during the refresh process is thereby greatly reduced. When a resume signal is received by the IO subsystem (30), the slow refresh clock (91) is terminated and the system memory (80) and video memory (50) are again refreshed using a normal faster clock.

公开(公告)号：HK66295A

公开(公告)日：1995-05-12

申请号：HK66295

申请日：1995-05-04

Applicant: INTEL CORP

Inventor： REDDY CHANDRASHEKAR M ,  HIROSE SCOTT D ,  CHO SUNG-SOO ,  KARDACH JAMES P ,  FARRER STEVEN M ,  ROBERTS MEELING

IPC: G06F1/04 ,  G06F1/32 ,  G06F15/78 ,  G11C11/401 ,  G11C11/406

Abstract: A power suspend mode activates a slow DRAM refresh in a computer system with a limited source of power. The power suspend mode reduces the power consumed by the computer system while preserving the contents of memory. The cyclic refresh of DRAM using a slow refresh clock substantially reduces the power consumed while the computer is suspended. This technique is particularly useful for battery powered portable computer systems. When an external or internal condition causes the computer system to transition to a power down mode, an IO subsystem notifies the CPU which sets control bits in the IO subsystem and a video subsystem. The IO subsystem then begins to generate a slow DRAM refresh pulse. Once the CPU and video subsystem sense the power suspend mode activation, the system memory and video memory are refreshed using the slow refresh clock. The power consumed during the refresh process is thereby greatly reduced. When a resume signal is received by the IO subsystem, the slow refresh clock is terminated and the system memory and video memory are again refreshed using a normal faster clock.

公开(公告)号：AU8908691A

公开(公告)日：1992-05-20

申请号：AU8908691

申请日：1991-10-11

Applicant: INTEL CORP

Inventor： REDDY CHANDRASHEKAR M ,  HIROSE SCOTT D ,  CHO SUNG-SOO ,  KARDACH JAMES P ,  FARRER STEVEN M ,  ROBERTS MEELING

IPC: G06F1/04 ,  G06F1/32 ,  G06F15/78 ,  G11C11/401 ,  G11C11/406 ,  G06F1/26

Abstract: A power suspend mode activates a slow DRAM refresh in a computer system with a limited source of power. The power suspend mode reduces the power consumed by the computer system while preserving the contents of memory. The cyclic refresh of DRAM using a slow refresh clock substantially reduces the power consumed while the computer is suspended. This technique is particularly useful for battery powered portable computer systems. When an external or internal condition causes the computer system to transition to a power down mode, an IO subsystem notifies the CPU which sets control bits in the IO subsystem and a video subsystem. The IO subsystem then begins to generate a slow DRAM refresh pulse. Once the CPU and video subsystem sense the power suspend mode activation, the system memory and video memory are refreshed using the slow refresh clock. The power consumed during the refresh process is thereby greatly reduced. When a resume signal is received by the IO subsystem, the slow refresh clock is terminated and the system memory and video memory are again refreshed using a normal faster clock.