953002CFLF Datasheet, PDF (2/35 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Next Gen P4 processor

Integrated
Circuit
Systems, Inc.
ICS953002
Pin Description
PIN #
PIN NAME
1 VDDA
2 GND
3 VDDREF
4 **FSL0/REF0
5 FSL1/REF1
6 X1
7 X2
8 GNDREF
9 VttPWR_GD/PD#
10 VDDPCI
11 **FSL2/PCICLK0
12 **FS3/~PCICLK1
13 PCICLK2
14 PCICLK3
15 GNDPCI
16 VDDPCI
17 PCICLK4
18 PCICLK5
19 GNDPCI
20 *Turbo#
21 Reset#
22 VDD48
23 **Mode0/48MHz
24 *Sel24_48#/24_48MHz
25 GND48
26 VDD3V66
27 **ITP_EN/3V66_2
28 **FS4/3V66_1
TYPE
PWR
PWR
PWR
I/O
I/O
IN
OUT
PWR
IN
PWR
I/O
I/O
OUT
OUT
PWR
PWR
OUT
OUT
PWR
IN
OUT
PWR
I/O
I/O
PWR
PWR
I/O
I/O
DESCRIPTION
3.3V power for the PLL core.
Ground pin.
Ref, XTAL power supply, nominal 3.3V
3.3V tolerant input for CPU frequency selection. Refer to input electrical
characteristics for Vil_FS and Vih_FS values. / 14.318 MHz reference
3.3V tolerant input for CPU frequency selection. Refer to input electrical
characteristics for Vil_FS and Vih_FS values. / 14.318 MHz reference
Crystal input, Nominally 14.318MHz.
Crystal output, Nominally 14.318MHz
Ground pin for the REF outputs.
This 3.3V LVTTL input is a level sensitive strobe used to determine when
latch inputs are valid and are ready to be sampled. This is an active high
input. / Asynchronous active low input pin used to power down the device
into a low power state.
Power supply for PCI clocks, nominal 3.3V
3.3V tolerant input for CPU frequency selection. Refer to input electrical
characteristics for Vil_FS and Vih_FS values. / 3.3V PCI clock output.
Frequency select latch input pin / 3.3V PCI clock output.
PCI clock output.
PCI clock output.
Ground pin for the PCI outputs
Power supply for PCI clocks, nominal 3.3V
PCI clock output.
PCI clock output.
Ground pin for the PCI outputs
Real time input pin to change frequency to a pre-programmed under or over
clock entries located in the Rom table.
Real time system reset signal for frequency gear ratio change or watchdog
timer timeout. This signal is active low.
Power pin for the 48MHz output.3.3V
Function select pin, 1=Mobile Mode, 0=Desktop Mode / 48MHz clock output.
3.3V.
Latched select input for 24/48MHz output / 24/48MHz clock output.
1=24MHz, 0 = 48MHz.
Ground pin for the 48MHz outputs
Power pin for the 3.3V 66MHz clocks.
3.3V 66.66MHz clock output./
ITP_EN: latched input to select pin functionality
1 = CPU_2_ITP pair
0 = PCI-EX0 pair
Frequency select latch input pin / 66.66MHz clock output. 3.3V
0924—11/18/09
2