ICS950703 Datasheet, PDF (3/24 Pages) Integrated Circuit Systems – PROGRAMMABLE TIMING CONTROL HUB FOR P4

Integrated
Circuit
Systems, Inc.
ICS950703
Pin Description
PIN
#
1 GND
PIN
NAME
2 MULTSEL0/REF0
3 MULTSEL1/REF1
4 VDDREF
5 X1
6 X2
7 GNDREF
8 PCICLK0
9 PCICLK1
10 VDDPCI
11 PCICLK2
12 PCICLK3
13 GNDPCI
14 PCICLK4
15 PCICLK5
16 VDDPCI
17 PCICLK6
18 **FS2/PCICLK7
19 GNDPCI
20 **FS3/PCICLK8
21 **SEL100_133#/PCICLK9
22 VDDPCI
23 SDATA
24 GND48
25 *FS0/48MHz_0
26 **FS1/48MHz_1
27 AVDD48
PIN
TYPE
DESCRIPTION
PWR Ground pin.
I/O ^{3.3V LVTTL input for selection the current multiplier for CPU outputs / 14.318 MHz reference}
clock.
I/O ^{3.3V LVTTL input for selection the current multiplier for CPU outputs / 14.318 MHz reference}
clock.
PWR Ref, XTAL power supply, nominal 3.3V
I/O Frequency select latch input pin / 3.3V PCI free running clock output.
I/O Frequency select latch input pin / 3.3V PCI free running clock output.
PWR Ground pin for the REF outputs.
OUT PCI clock output.
I/O Watchdog enable latch input/ 3.3V PCI clock output.
PWR Power supply for PCI clocks, nominal 3.3V
OUT PCI clock output.
OUT PCI clock output.
PWR Ground pin for the PCI outputs
OUT PCI clock output.
OUT PCI clock output.
PWR Power supply for PCI clocks, nominal 3.3V
OUT PCI clock output.
I/O Frequency select latch input pin / 3.3V PCI clock output.
PWR Ground pin for the PCI outputs
I/O Frequency select latch input pin / 3.3V PCI clock output.
I/O ^{Latched select input for 100 or 133.3MHz selection. 0=133MHz, 1 = 100MHz / 3.3V PCI}
clock output.
PWR Power supply for PCI clocks, nominal 3.3V
I/O Data pin for SMBus circuitry, 5V tolerant.
PWR Ground pin for the 48MHz outputs
I/O Frequency select latch input pin / Fixed 48MHz clock output. 3.3V
I/O Frequency select latch input pin / Fixed 48MHz clock output. 3.3V
PWR Analog power for 48MHz outputs and fixed PLL core, nominal 3.3V
28 PD#
Asynchronous active low input pin, with 120Kohm internal pull-up resistor, used to power
IN _{down the device. The internal clocks are disabled and the VCO and the crystal are stopped.}
* Internal Pull-Up Resistor ** Internal Pull-Down Resistor ~ This output has 2X drive
0690D—05/14/04
3