Patent ID: 7093066
Filing Date: 2006-08-15
Classification: G06F,G11C,H05K,Y02P

Abstract:
1. A method of making a memory module comprising: attaching at least one memory integrated circuit to a printed circuit board, said printed circuit board comprising data bus contacts on a portion thereof; coupling said data bus contacts on said printed circuit board to data bus terminals on said memory integrated circuit through a bus switch; attaching a state decoder to the printed circuit board, the printed circuit board further comprising control bus contacts on a portion thereof; coupling the control bus contacts on the printed circuit board to control bus terminals on the state decoder; and interfacing the state decoder with a host system comprising a memory controller, the memory controller producing control signals, wherein the control signals comprise at least one of a row address strobe (RAS), a column address strobe (CAS), and a write enable (WE); wherein said state decoder decodes the control signals to determine whether the memory integrated circuit is being accessed and produces a gate control signal to selectively control said bus switch; wherein, in response to the gate control signal, the bus switch decouples the data bus from the memory integrated circuit when the memory integrated circuit is not being accessed to reduce data bus capacitance; and wherein the interfacing does not provide the gate control signal to the bus switch.