| Pin Number | Pin Name | PWR | I/O | Pin Description |
| 11 | SELSDR_DDR#/ PCI1 | VDDPCI | I/O PD | Power-on Bidirectional Input/Output. At power-up, SELSDR_DDR is the input. When the power supply voltage crosses the input threshold voltage, SELSDR_DDR state is latched and this pin becomes PCI clock output. SeISDR_DDR#.= 0, DDR Mode. SeISDR_DDR#.= 1, SDR Mode. |
| 21 | FS2/24 48M | VDD48M | I/O PD | Power-on Bidirectionallnput/Output. At power-up, FS2 is the input. When the power supply voltage crosses the input threshold voltage, FS2 state is latched and this pin becomes 24_48M, a Slo programmable clock output. |
| 6 | AGPO | VDDAGP | O | AGP Clock Output. Is synchronous to CPU clocks. See Table 7 |
| 8 | AGP2 | VDDAGP | O | AGP Clock Output. Is synchronous to CPU clocks. See Table 7 |
| 25 | IREF | | I | Current reference programming input for CPU buffers. A precise resistor is attached to this pin, which is connected to the internal current reference. |
| 28 | SDATA | | 1/0 | Serial Data Input. Conforms to the Phillips 12C specification of a Slave Receive/Transmit device. It is an input when receiving data. It is an open drain output when acknowledging or transmitting data. |
| 27 | SCLK | | I | Serial Clock Input. Conforms to the Philips 12C specification. |
| 26 | PD/SRESET# | | I/O PU | Power-downlnput/System Reset Control Output. If Byte6 Bit7 = O(default), this pin becomes a SRESET# open drain output. See system resetdescription. If Byte6Bit7 = 1, this pin becomes PD# input with an internal pull-up. When PD# is asserted low, the device enters power down mode. See power management function. |
| 45 | BUF IN | | | If SeISDR_DDR.= 0, 2.5V CMOS type input to the DDR differential buffers. If SeISDR_DDR#.= 1, 3.3V CMOS type input to the SDR buffer. |
| 46 | FBOUT | | | If SeISDR_DDR#.= 0, 2.5V single ended SDRAM buffered output of the signal applied at BUF_IN. It is in phase with the DDRT(0:5) signals.lf SeISDR_DDR#.= 1, 3.3V single ended SDRAM buffered output of the signal applied at BUF_IN. It is in phase with the SDRAM(O:11) signals |
| 5 | VDDAGP | | | 3.3V power supply for AGP clocks |
| 51 | VDDC | | | 3.3V power supply for CPUT/C clocks |
| 16 | VDDPCI | | | 3.3V power supply for PCI clocks |
| 55 | VDDR | | | 3.3V power supply for REF clock |
| 50 | VDDI | | | 2.5V power supply for CPUCS_T/C clocks |
| 22 | VDD 48M | | | 3.3V power supply for 48M |
| 23 | VDD | | | 3.3V Common power supply |
| 34,40 | VDDD | | | If SeISDR_DDR#.= 0, 2.5V power supply for DDR clockslf SeISDR_DDR#.= 1, 3.3V power supply for SDR clocks. |
| 9 | VSSAGP | | | Ground for AGP clocks |
| 13 | VSSPCI | | | Ground for PCI clocks |
| 54 | VSSC | | | Ground for CPUT/C clocks |
| 33,39 | VSSD | | | Ground for DDR clocks |
| 19 | VSS 48M | | | Ground for 48M clock |
| 47 | VSSI | | | Ground forICPUCS_T/C clocks |
| 2 | VSSR | | | Ground for REF |
| 24 | VSS | | | Common Ground |
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