| 摘要 |
A memory controller 2 for controlling DDR SDRAM includes a physical layer block 10 connected to output pads 18 for driving the output pads with electrical signals, and a memory control block 12 for generating and receiving data signals, address signals and control signals and passing them to the physical layer block which converts these signals into the electrical signals actually transmitted from the controller. A multiplexer 16 is provided, not between the physical layer block 10 and the output pads 18, but between the memory control block 12 and the physical layer block 10. |
