ics950402 Integrated Device Technology, ics950402 Datasheet - Page 2

• Manufacturer Part Number: ics950402
• Description: Amd - K8 System Clock Chip
• Manufacturer: Integrated Device Technology

Pin Descriptions
ICS950402
0700B—04/30/04
* Internal Pull-Up Resistor ** Internal Pull-Down Resistor ~ This Output has 2X Drive Strength
**** This Output has 2.3X Drive Strength
PIN #
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1
2
3
4
5
6
7
8
9
*FS0/REF0
VDDREF
X1
X2
GND
*(PCICLK7/HTTCLK0)ModeA
*PCICLK8/HTTCLK1/ModeB
PCICLK9/HTTCLK2
VDDPCI
GND
~PCICLK10/HTTCLK3
PCICLK11
PCICLK0
PCICLK1
GND
VDDPCI
****PCICLK2
****PCICLK3
VDDPCI
GND
PCICLK4
PCICLK5
~*PCICLK_F/ModeC
~*(PCICLK6)PCI_STOP#
SCLK
SDATA
GND
24_48MHz/Sel24_48#*~
AVDD48
GND
48MHz/FS3**
VDD
GND
GND
VDDCPU
CPUCLK8C1
CPUCLK8T1
VDDCPU
GND
CPUCLK8C0
CPUCLK8T0
GND
VDDA
Reset#
REF2/FS2*
VDDREF
GND
REF1/FS1*
PIN NAME
TYPE
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
PIN
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IN
IN
Frequency select latch input pin / 14.318 MHz reference clock.
Ref, XTAL power supply, nominal 3.3V
Crystal input, Nominally 14.318MHz.
Crystal output, Nominally 14.318MHz
Ground pin.
PCI clock output / Hyper Transport output / Mode selection pin, this input is activated by the
ModeB selection pin.
PCI clock output / Hyper Transport output / Mode selection latch input pin.
PCI clock output / Hyper Transport output.
Power supply for PCI clocks, nominal 3.3V
Ground pin.
PCI clock output / Hyper Transport output.
PCI clock output.
PCI clock output.
PCI clock output.
Ground pin.
Power supply for PCI clocks, nominal 3.3V
Real time system reset signal for watchdog timer timeout. This signal is active low and
selected by Mode latch input / 3.3V PCI clock clock output.
Stops all PCICLKs besides the PCICLK_F clocks at logic 0 level, when input low / PCI clock
output, this output is activated by the Mode selection pin
Power supply for PCI clocks, nominal 3.3V
Ground pin.
PCI clock output.
PCI clock output.
Free running PCI clock not affected by PCI_STOP# / Mode selection latch input pin.
PCI clock output, this output is activated by the Mode selection pin / Stops all PCICLKs
besides the PCICLK_F clocks at logic 0 level, when input low.
Clock pin of I2C circuitry 5V tolerant
Data pin for I2C circuitry 5V tolerant
Ground pin.
24/48MHz clock output / Latched select input for 24/48MHz output. 0=48MHz, 1 = 24MHz.
Power for 24/48MHz outputs and fixed PLL core, nominal 3.3V
Ground pin.
Frequency select latch input pin / Fixed 48MHz clock output. 3.3V
Power supply, nominal 3.3V
Ground pin.
Ground pin.
Supply for CPU clocks, 3.3V nominal
"Complimentary" clocks of differential 3.3V push-pull K8 pair.
"True" clocks of differential 3.3V push-pull K8 pair.
Supply for CPU clocks, 3.3V nominal
Ground pin.
"Complimentary" clocks of differential 3.3V push-pull K8 pair.
"True" clocks of differential 3.3V push-pull K8 pair.
Ground pin.
3.3V power for the PLL core.
Real time system reset signal for frequency gear ratio change or watchdog timer timeout.
This signal is active low.
14.318 MHz reference clock / Frequency select latch input pin.
Ref, XTAL power supply, nominal 3.3V
Ground pin.
14.318 MHz reference clock / Frequency select latch input pin.
2
DESCRIPTION