參數(shù)資料
型號(hào): ICS952621
英文描述: Programmable Timing Control Hub⑩ for Next Gen P4⑩ processor
中文描述: 可編程定時(shí)控制中心⑩處理器的下一代?、?/td>
文件頁(yè)數(shù): 2/15頁(yè)
文件大?。?/td> 198K
代理商: ICS952621
2
Integrated
Circuit
Systems, Inc.
ICS952621
0756A—09/10/04
Pin Description
PIN
#
PIN NAME
PIN TYPE
DESCRIPTION
1
FS_A/REF1
I/O
FS_A latched input for frequency select
Reference output, 14.318Hz
FS_B latched input for frequency select
Reference output, 14.318Hz
Ref, XTAL power supply, nominal 3.3V
Crystal input, Nominally 14.318MHz.
Crystal output, Nominally 14.318MHz
Ground pin.
Free running PCI clock not affected by PCI_STOP# .
Free running PCI clock not affected by PCI_STOP# .
Free running PCI clock not affected by PCI_STOP# .
Power supply for PCI clocks, nominal 3.3V
Ground pin.
PCI clock output.
PCI clock output.
PCI clock output.
PCI clock output.
Power supply for PCI clocks, nominal 3.3V
Ground pin.
PCI clock output.
PCI clock output.
Asynchronous active low input pin, with 120Kohm internal pull-up resistor, used
to power down the device. The internal clocks are disabled and the VCO and
the crystal are stopped.
48.008MHz Dot clock output
48.008MHz USB clock output
Ground pin.
Power for 48MHz output buffers and fixed PLL core.
3.3V 66.66MHz clock output
VCH: 48MHz VCH clock output
3.3V 66.66MHz clock output
Power pin for the 3V66 clocks.
Ground pin.
3.3V 66.66MHz clock output
3.3V 66.66MHz clock output
Clock pin of SMBus circuitry, 5V tolerant.
Data pin for SMBus circuitry, 5V tolerant.
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 low input.
Power supply, nominal 3.3V
Complementary clock of differential pair for S-ATA support.
+/- 300ppm accuracy required.
True clock of differential pair for S-ATA support.
+/- 300ppm accuracy required.
Ground pin.
Complementary clock of differential pair CPU outputs. These are current mode
outputs. External resistors are required for voltage bias.
True clock of differential pair CPU outputs. These are current mode outputs.
External resistors are required for voltage bias.
Supply for CPU clocks, 3.3V nominal
Complementary clock of differential pair CPU outputs. These are current mode
outputs. External resistors are required for voltage bias.
True clock of differential pair CPU outputs. These are current mode outputs.
External resistors are required for voltage bias.
Ground pin.
"Complementary" clocks of differential pair CPU outputs for ITP.. These are
current mode outputs. External resistors are required for voltage bias.
"True" clocks of differential pair CPU outputs for ITP. These are current mode
outputs. External resistors are required for voltage bias.
This pin establishes the reference current for the differential current-mode
output pairs. This pin requires a fixed precision resistor tied to ground in order
to establish the appropriate current. 475 ohms is the standard value.
Ground pin.
3.3V power for the PLL core.
2
FS_B/REF0
I/O
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
VDDREF
X1
X2
GND
PCICLK_F0
PCICLK_F1
PCICLK_F2
VDDPCI
GND
PCICLK0
PCICLK1
PCICLK2
PCICLK3
VDDPCI
GND
PCICLK4
PCICLK5
PWR
IN
OUT
PWR
OUT
OUT
OUT
PWR
PWR
OUT
OUT
OUT
OUT
PWR
PWR
OUT
OUT
20
PD#
IN
21
22
23
24
48MHz_DOT
48MHz_USB
GND
VDD48
OUT
OUT
PWR
PWR
25
3V66_3/VCH
OUT
26
27
28
29
30
31
32
3V66_2
VDD3V66
GND
3V66_1
3V66_0
SCLK
SDATA
OUT
PWR
PWR
OUT
OUT
IN
I/O
33
VttPWR_GD#
IN
34
VDD
OUT
35
SRCCLKC
OUT
36
SRCCLKT
OUT
37
GND
PWR
38
CPUCLKC0
OUT
39
CPUCLKT0
OUT
40
VDDCPU
PWR
41
CPUCLKC1
OUT
42
CPUCLKT1
OUT
43
GND
PWR
44
CPUCLKC_ITP
OUT
45
CPUCLKT_ITP
OUT
46
IREF
OUT
47
48
GND
VDDA
PWR
PWR
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