932SQ420D
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
IDT®
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS 7
932SQ420D REV J 010715
Pin Descriptions - 64 MLF (cont).
35 VDDNS PWR 3.3V power for the Non-Spreading differential outputs outputs and logic
36 GNDNS PWR Ground pin for non-spreading differential outputs and logic.
37 NS_SAS0C OUT
Complementary clock of differentia non-spread ing SAS output. These are current mode outputs and external
33 ohm series resistors and 49.9 ohm shunt resistors are re
uired for termination.
38 NS_SAS0T OUT
True clock of differential non-spreading SAS output. These are current mode outputs. These are current
mode outputs and external 33 ohm series re sistors and 49 .9 ohm shunt resistors are required for termination.
39 NS_SAS1C OUT
Complementary clock of differential non-spreading SAS output. These are current mode outputs and external
33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
40 NS_SAS1T OUT
True clock of differential non-spreading SAS output. These are current mode outputs. These are current
mode outputs and external 33 ohm series re sistors and 49 .9 ohm shunt resistors are required for termination.
41 AVDD_NS_SAS PWR 3.3V power for the non-spreading SAS/SRC PLL analog circuits.
42 GNDNS PWR Ground pin for non-spreading differential outputs and logic.
43 CPU0C OUT
Complementary clock of differential CPU output. These are current mode o utputs and external 33 ohm series
resistors and 49.9 ohm shunt resistors are required for termination.
44 CPU0T OUT
True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors
and 49.9 ohm shunt resistors are required for termination.
45 CPU1C OUT
Complementary clock of differential CPU output. These are current mode o utputs and external 33 ohm series
resistors and 49.9 ohm shunt resistors are required for termination.
46 CPU1T OUT
True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors
and 49.9 ohm shunt resistors are re
uired for termination.
47 VDDCPU PWR 3.3V
ower for the CPU out
uts and lo
ic
48 GNDCPU PWR Ground
in for CPU out
uts and lo
ic.
49 CPU2C OUT
Complementary clock of differential CPU output. These are current mode o utputs and external 33 ohm series
resistors and 49.9 ohm shunt resistors are re
uired for termination.
50 CPU2T OUT
True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors
and 49.9 ohm shunt resistors are re
uired for termination.
51 CPU3C OUT
Complementary clock of differential CPU output. These are current mode o utputs and external 33 ohm series
resistors and 49.9 ohm shunt resistors are re
uired for termination.
52 CPU3T OUT
True clock of differential CPU output. These are current mode outputs and external 33 ohm series resistors
and 49.9 ohm shunt resistors are re
uired for termination.
53 VDDCPU PWR 3.3V
ower for the CPU out
uts and lo
ic
54 SMBDAT I/O Data pin of SMBUS circuitry, 5V tolerant
55 SMBCLK IN Clock pin of SMBUS circuitry, 5V tolerant
56 GND14 PWR Ground pin for 14MHz output and logic.
57 AVDD14 PWR Analog power pin for 14MHz PLL
58 VDD14 PWR Power pin for 14MHz output and logic
59 vREF14_3x/TEST_SEL I/O
14.318 MHz reference clock. 3X drive streng th as default / TEST_SEL latched input to enable test mode. Refer
to Test Clarification Table. This
in has a weak
~120Kohm
internal
ull down.
60 GND14 PWR Ground pin for 14MHz output and logic.
61 GNDXTAL PWR Ground pin for Crystal Oscillator.
62 X1_25 IN Crystal input, Nominally 25.00MHz.
63 X2_25 OUT Crystal output, Nominally 25.00MHz.
64 VDDXTAL PWR 3.3V power for the crystal oscillator.
