AV9248-73 Ver la hoja de datos (PDF) - Integrated Circuit Systems
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AV9248-73 Datasheet PDF : 15 Pages
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ICS9248 - 73
Pin Descriptions
PIN
NUMBER
1
2, 9, 10,
18, 25, 30, 38
PIN NAME
SEL_3V66
REF0
VDD
3
X1
4
5, 6, 14, 21,
29, 42, 34,
7, 8
11
12
13
15, 16, 17,
19, 20
X2
GND
3V66 (0:1)
PCICLK0
FS0
PCICLK1
FS1
PCICLK2
SEL24_48#
PCICLK (3:7)
22
PD#
23
SCLK
24
SDATA
48MHz
26
FS3
27
48MHz
24_48MHz
28
FS2
29
GND48
31
41, 40, 39, 37,
36, 35, 33, 32,
43
SDRAM_F
SDRAM (0:7)
GNDL
45, 44
47
48, 46
CPUCLK (0:1)
IOAPIC
VDDL
TYPE
DESCRIPTION
IN This pin selects the 3V66 output frequency.
OUT 3.3V, 14.318MHz reference clock output.
PWR 3.3V power supply
IN
OUT
Crystal input, has internal load cap (33pF) and feedback
resistor from X2
Crystal output, nominally 14.318MHz.
Has internal load cap (33pF)
PWR Ground pins for 3.3V supply
OUT
OUT
IN
OUT
IN
OUT
IN
3.3V clock outputs for HUB running at 2XPCI MHz
3.3V PCI clock outputs, with Synchronous CPUCLKS
Logic input frequency select bit. Input latched at power on.
3.3V PCI clock outputs, with Synchronous CPUCLKS
Logic input frequency select bit. Input latched at power on.
3.3V PCI clock outputs, with Synchronous CPUCLKS
Logic input to select output.
OUT 3.3V PCI clock outputs, with Synchronous CPUCLKS
Asynchronous active low input pin used to power down the device into
IN
a low power state. The internal clocks are disabled and the VCO and
the crystal are stopped. The latency of the power down will not be
greater than 3ms.
IN Clock input of I2C input
IN Data input for I2C serial input.
OUT 3.3V Fixed 48MHz clock output for USB
IN Logic input frequency select bit. Input latched at power on.
OUT 3.3V Fixed 48MHz clock output for USB
OUT 24 or 48MHz output controlled by SEL24_48#.
IN Logic input frequency select bit. Input latched at power on.
PWR
OUT
OUT
PWR
OUT
OUT
PWR
Ground for 48MHz outputs
3.3V free running 100MHz SDRAM not affected by I2C
3.3V output running 100MHz. All SDRAM outputs can be turned off
through I2C
Ground for 2.5V power supply for CPU & APIC
2.5V Host bus clock output, up to 150MHz depending on FS (0:3)
pins Refer page 3.
2.5V clock outputs running at PCI/2 MHz.
2.5V power suypply for CPU, IOAPIC
2
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