ics9248-72 ETC-unknow, ics9248-72 Datasheet - Page 2

• Manufacturer Part Number: ics9248-72
• Description: Frequency Timing Generator Pentium Systems
• Manufacturer: ETC-unknow

Pin Descriptions
Preliminary Product Preview
Power Groups:
ICS9248-72
19, 18, 16, 15, 13,
6, 14, 20, 26, 32
Pin number
3, 24, 29, 33
23, 22, 21
12, 11, 10
1, 45, 46
36, 35
37, 40
9,17
8, 7
25
27
30
31
34
41
42
43
47
48
28
2
4
5
CPUCLK [1:0]
SEL 133/100#
GNDLIOAPIC
PCICLK [1:0]
PCICLK [9:2]
24_48MHz#
GNDLCPU/2
VDDLCPU/2
IOAPIC[2:0]
Pin name
VDDLCPU
SEL24/48
GNDREF
VDDPCI
48 MHz
FS [2:1]
SDATA
CPU/2
SCLK
REF0
3V66
VDD
GND
FS0
PD#
X1
X2
Output
Output
Output
Output
Output
Output
Output
Output
Output
0utput
Type
Power
Power
Power
Power
Power
Power
Power
Power
Input
Input
Input
IN
IN
IN
IN
IN
2.5V IOAPIC clock outputs
3.3V, 14.318 MHz reference clock output.
3.3 V power
14.318 MHz crystal input
14.318 MHz crystal output
Ground
Frequency select pins. Latched Inputs determins the CPU & PCI frequencies.
3.3 V PCI clock outputs, generating timing requirements for
3.3 V power for the PCI clock outputs
3.3 V PCI clock outputs
3.3 V 66 MHz clock output, fixed frequency clock typically used with AGP
control for the frequency of clocks at the CPU output pins. If logic "0" is used the
100 MHz frequency is selected. If Logic "1" is used, the 133 MHz frequency is
selected. The PCI clock is multiplexed to run at 33.3 MHz for both selected cases.
Frequency select pin. Latched Inputs determins the CPU & PCI frequencies.
3.3 V 48 MHz clock output, fixed frequency clock typically used with USB
devices
48/24 MHz select option. Active low = 48 MHz output. Active High = 24
MHz
3.3V 48 or 24 MHz clock output, fixed frequency clock typically used with
USB devices.
Clock input of I2C input
Asynchronous active low input pin used to power down the device into a low
power state. The internal clocks are disabled and the VCO and the crystal are
stopped.
Data input for I
2.5 V CPU and Host clock outputs
2.5 V power for the CPU and Host clock outputs
Ground for the CPU and Host clock outputs
output running at 1/2 CPU clock frequency.Synchronous to the CPU outputs.
2.5 V power for the CPU/2 clock outputs
Ground for IOAPIC clocks
Ground for 14.318 MHz reference clock outputs
2
C serial input.
Description