PIN # PIN NAME PIN TYPE DESCRIPTION
1 X2_25 OUT Crystal output, Nominally 25.00MHz.
2 X1_25 IN Crystal input, Nominally 25.00MHz.
3 GNDREF PWR Ground pin for the REF outputs.
4 REF5 OUT Copy of crystal input
5 REF4 OUT Copy of crystal input
6 REF3 OUT Copy of crystal input
7 VDDREF PWR Ref, XTAL power supply, nominal 3.3V
8 GNDREF PWR Ground pin for the REF outputs.
9 REF2 OUT Copy of crystal input
10 REF1 OUT Copy of crystal input
11
^SELPCIE125#_100/RE
F0
I/O
Latched input to select the PCIe output frequency/REF0 output.
0 = 125M
1 = 100M
12 AVDD12_24 PWR Power for 12_24MHz PLL core, and outputs. Nominal 3.3V
13 ^FS0/USB_CLK1 I/O
Frequency select latch for Sys_CCB / 12 or 24MHz USB clock output. 3.3V. This pin has an
internal pull up resistor.
14 ^FS1/USB_CLK2 I/O
Frequency select latch for Sys_CCB / 12 or 24MHz USB clock output. 3.3V. This pin has an
internal pull up resistor.
15 GND12_24 PWR Ground pin for 12_24M outputs.
16 GND2.048 PWR Ground pin for 2.048M outputs.
17 CK2.048_0 OUT 2.048M output, nominal 3.3V.
18 CK2.048_1 OUT 2.048M output, nominal 3.3V.
19 VDD2.048 PWR Power supply for 2.048M outputs, nominal 3.3V.
20 AVDD125 PWR Power for 125MHz PLL core and output, nominal 3.3V
21 125M OUT 125M output, nominal 3.3V.
22 GND125M PWR Ground pin for 125M outputs.
23 PCIeT_LR0 OUT True clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series resistor
24 PCIeC_LR0 OUT
Complement clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series
resistor
25 PCIeC_LR1 OUT
Complement clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series
resistor
26 PCIeT_LR1 OUT True clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series resistor
27 VDDPCIe PWR Power supply for PCI Express outputs, nominal 3.3V
28 GNDPCIe PWR Ground pin for the PCIe outputs.
29 PCIeC_LR2 OUT
Complement clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series
resistor
30 PCIeT_LR2 OUT True clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series resistor
31 PCIeC_LR3 OUT
Complement clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series
resistor
32 PCIeT_LR3 OUT True clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series resistor
33 AVDDPCIe PWR Analog Power supply for PCI Express clocks, nominal 3.3V
34 GNDPCIe PWR Ground pin for the PCIe outputs.
35 PCIeC_LR4 OUT
Complement clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series
resistor
36 PCIeT_LR4 OUT True clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series resistor
37 PCIeC_LR5 OUT
Complement clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series
resistor
38 PCIeT_LR5 OUT True clock of 0.8V differential push-pull PCI_Express pair with integrated 33ohm series resistor
39 GNDPCIe PWR Ground pin for the PCIe outputs.
40 GNDSYS PWR Ground pin for the Sys_CCB output
41 Sys_CCB OUT System CCB clock output
42 AVDDSYS PWR Analog Power supply for Sys_CCB clock and outputs, nominal 3.3V
43 VddDDR PWR Power supply for DDR Clock output, nominal 3.3V
44 ^SEL100#_66/DDRCLK I/O
Latched input to select the DDR output frequency/DDRCLK output. See note regarding system
power sequencing.
0 = 100M
1 = 66.666M
45 GndDDR PWR Ground pin for the DDR outputs.
46 SCLK IN Clock pin of SMBus circuitry.
47 SDATA I/O Data pin for SMbus circuitry.
48 VDDREF PWR Ref, XTAL power supply, nominal 3.3V
