The CY2277A has power-down, CPU stop and PCI stop pins for power management control. The CPU stop and PCI stop are controlled by the MODE pin. They are multiplexed with SDRAM clock outputs, and are selected when the MODE pin is driven LOW. Additionally, these inputs are synchronized on-chip, enabling glitch-free transitions. When the CPU_STOP input is asserted, the CPU outputs are driven LOW. When the PCI_STOP input is asserted, the PCI outputs (except the free-running PCI clock) are driven LOW. Finally, when the PWR_DWN pin is asserted, the reference oscillator and PLLs are shut down, and all outputs are driven LOW. The CY2277A outputs are designed for low EMI emission. Controlled rise and fall times, unique output driver circuits and factory-EPROM programmable output drive and slew-rate enable optimal configurations for EMI control.