PI6C100 Просмотр технического описания (PDF) - Pericom Semiconductor
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PI6C100 Datasheet PDF : 13 Pages
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PI6C100
Precision Clock Synthesizer
for Desktop PCs
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Pin Description
Pin
Signal Name
1,2,47 REF[0:2]
3
VSSREF
48
VDDREF
4
XTAL_IN
5
XTAL_OUT
6,12,18
7
VSSPCI[0:2]
PCICLK_F
9,15
8,10,11,13,
14,16,17
VDDPCI[0:1]
PCICLK[1:7]
19,33
20,32
21
24
22,23
VDDCORE[0:1]
VSSCORE[0:1]
VDD48MHz
VSS48MHz
48MHz
26,27
SEL[0:1]
25
SEL100/66#
29
30
31
37,41
34,38
35,36,39,40
43
46
44,45
28
42
PWRDWN#
CPUSTOP#
PCI_STOP#
VDDCPU[0:1]
VSSPCU[0:]
CPUCLK[0:3]
VSSAPIC
VDDAPIC
APIC[0:1]
SPREAD#
NC
Type
O
ground
power
I
O
ground
O
power
O
power
ground
power
ground
O
1
I
I
I
I
power
ground
O
ground
power
O
I
Qty.
Description
3 14.318 MHz clock output.
1 Ground for REF[0:2] outputs
1 Power for REF[0:2] outputs
1 14.318 MHz crystal input.
1 14.318 MHz crystal output.
3 Ground for PCI clock outputs
1 Free running PCI clock output
2 Power for PCI clock outputs
7
PCI clock outputs, TTL
compatible 3.3V
2 Isolated power for core
2 Isolated ground for core
1 Isolated power for 48 MHz outputs
1 Isolated ground for 48 MHz outputs
2 48 MHz outputs
2 Logic select pins. LVTTL levels
1
Select pin for enabling 100 MHz or 66 MHz
H = 100 MHz. L = 66 MHz
1 Powers down device when held LOW
Stops CPU clocks LOW if held LOW
1 Stops PCI clocks LOW if held LOW
2 Power for CPU outputs
2 Ground for CPU outputs
4 CPU and Host clock outputs 2.5V
1 Ground for APIC outputs
1 Power for APIC outputs
2 APIC outputs @2.5V. 14.31818 MHz
1 Enables Spread Spectrum feature when LOW
1 Reserved for future modification
199
PS8142A 10/13/98
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