Title:
DMAコントローラ及びデータ転送制御方法
Document Type and Number:
Japanese Patent JP4668645
Kind Code:
B2
Abstract:
A DMA controller is connected by a bus to a plurality of master devices and a plurality of slave devices, and performs a data transfer between slave devices which are specified as a source and a destination of the data transfer by a transfer condition received from any of the plurality of master devices. Each of the plurality of master devices and the plurality of slave devices has a rank used for judging data transfer permissibility. The DMA controller enables the data transfer if the data transfer is judged to be permitted as a result of a comparison between a rank of the master device and a rank of any of the specified slave devices, and disables the data transfer if the data transfer is judged to be prohibited.
Inventors:
Torisaki Yuiyuki
Yusuke Nemoto
Mutsumi Fujiwara
Yusuke Nemoto
Mutsumi Fujiwara
Application Number:
JP2005049398A
Publication Date:
April 13, 2011
Filing Date:
February 24, 2005
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G06F12/14; G06F13/28; G06F21/60; G06F21/62; G06F21/85
Domestic Patent References:
| JP2001297054A | ||||
| JP2003281076A | ||||
| JP11282795A |
Foreign References:
| US6857035 |
Attorney, Agent or Firm:
Shiro Nakajima