Patent ID: 6603217
Filing Date: 2003-08-05
Classification: G11C

Abstract:
A semiconductor circuit device including a first hierarchical block and a plurality of second hierarchical blocks,said first hierarchical block including: a first power supply system disposed to supply a voltage to an internal circuit in said first hierarchical block, a first receiving circuit disposed to receive an externally supplied first request signal and activate said first power supply system, and a plurality of transmission circuits corresponding to said plurality of second hierarchical blocks, each disposed to transmit a second request signal to corresponding said second hierarchical block, wherein said first receiving circuit returns a first response signal to an external device after said first power supply system is activated, and said internal circuit in said first hierarchical block activates/inactivates said second request signal in response to an externally supplied first command signal, each said second hierarchical block including: a second power supply system disposed to supply a voltage to an internal circuit in said second hierarchical block, and a second receiving circuit disposed to receive said second request signal and activate said second power supply system.