932SQ420D
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
Pin Descriptions - 64 MLF
PIN #
PIN NAME
TYPE
DESCRIPTION
1
2
3
4
5
6
7
8
9
GNDPCI
PWR Ground pin for PCI outputs and logic.
PWR 3.3V power for the PCI outputs and logic
OUT 3.3V PCI clock output
OUT 3.3V PCI clock output
OUT 3.3V PCI clock output
OUT 3.3V PCI clock output
OUT 3.3V PCI clock output
PWR Ground pin for PCI outputs and logic.
PWR 3.3V power for the PCI outputs and logic
PWR 3.3V power for the 48MHz output and logic
VDDPCI
PCI4_2x
PCI3_2x
PCI2_2x
PCI1_2x
PCI0_2x
GNDPCI
VDDPCI
10 VDD48
3.3V 48MHz output/ 3.3V tolerant CPU frequency select latched input pin. See VilFS and VihFS values for
11 ^48M_2x/100M_133M#
I/O thresholds. This pin has a weak (~120Kom) internal pull up.
1 = 100MHz, 0 = 133MHz operating frequency
PWR Ground pin for 48MHz output and logic.
PWR Ground pin for DOT96 output and logic.
12 GND48
13 GND96
True clock of differential 96MHz output. These are current mode outputs. These are current mode outputs
and external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
14 DOT96T
OUT
Complementary clock of differential 96MHz output. These are current mode outputs and external 33 ohm
series resistors and 49.9 ohm shunt resistors are required for termination.
15 DOT96C
OUT
16 AVDD96
PWR 3.3V power for the 48/96MHz PLL and the 96MHz output and logic
TEST_MODE is a real time input to select between Hi-Z and REF/N divider mode while in test mode. Refer to
Test Clarification Table.
17 TEST_MODE
IN
CKPWRGD# is an active low input used to sample latched inputs and allow the device to Power Up. PD is an
18 CKPWRGD#/PD
19 VDDSRC
IN
asynchronous active high input pin used to put the device into a low power state. The internal clocks and PLLs
are stopped.
PWR 3.3V power for the SRC outputs and logic
True clock of differential SRC output. These are current mode outputs. These are current mode outputs and
external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
20 SRC0T
OUT
Complementary clock of differential SRC output. These are current mode outputs and external 33 ohm
series resistors and 49.9 ohm shunt resistors are required for termination.
PWR Ground pin for SRC outputs and logic.
21 SRC0C
22 GNDSRC
23 SRC1C
OUT
Complementary clock of differential SRC output. These are current mode outputs and external 33 ohm series
resistors and 49.9 ohm shunt resistors are required for termination.
OUT
True clock of differential SRC output. These are current mode outputs. These are current mode outputs and
external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
Complementary clock of differential SRC output. These are current mode outputs and external 33 ohm series
resistors and 49.9 ohm shunt resistors are required for termination.
True clock of differential SRC output. These are current mode outputs. These are current mode outputs and
external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
24 SRC1T
25 SRC2C
26 SRC2T
OUT
OUT
OUT
27 VDDSRC
28 AVDD_SRC
29 GNDSRC
PWR 3.3V power for the SRC outputs and logic
PWR 3.3V power for the SRC PLL analog circuits
PWR Ground pin for SRC outputs and logic.
This pin establishes the reference current for the differential current-mode output pairs. This pin requires a
30 IREF
OUT fixed precision resistor tied to ground in order to establish the appropriate current. 475 ohms is the standard
value.
Complementary clock of differential non-spreading SRC output. These are current mode outputs and external
33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
31 NS_SRC0C
32 NS_SRC0T
33 NS_SRC1C
34 NS_SRC1T
OUT
True clock of differential non-spreading SRC output. These are current mode outputs. These are current
mode outputs and external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
OUT
Complementary clock of differential non-spreading SRC output. These are current mode outputs and external
33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
OUT
True clock of differential non-spreading SRC output. These are current mode outputs. These are current
mode outputs and external 33 ohm series resistors and 49.9 ohm shunt resistors are required for termination.
OUT
IDT® PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
6
932SQ420D
REV H 042012
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
