FEATURES
® 2.0 DESCRIPTION
Generates clocks required for Intel i820 based desktop and workstation systems, including: Four enabled 2.5V 133/100MHz CPU Front Side Bus (FSB) clocks Two 2.5V CPU/2 clocks for synchronous memory Seven enabled 3.3V PCI bus clocks and one free-running PCI clock Four enabled 3.3V 66MHz AGP clocks Three 2.5V 16.67MHz APIC bus clocks Two 3.3V 14.318MHz REF clocks One 3.3V 48MHz USB clock Two different frequencies can be selected for the CPU clocks via two SEL pins. Glitch-free stop clock control of the CPU, AGP (66MHz) and PCI clocks is provided. A low current power-down mode is available for mobile applications. Separate clock buffers provide for a 2.5V voltage range on the CPU_0:3, CPU/2_0:1 and APIC_0:2 clocks. Figure 2: Pin Configuration VSS_R REF_0 REF_1 VDD_R XIN XOUT VSS_P PCI_F PCI_1 VDD_P PCI_2 PCI_3 VSS_P PCI_4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34...
AMI
