PCK2020 データシートの表示（PDF） - Philips Electronics
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コンポーネント説明
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PCK2020 Datasheet PDF : 16 Pages
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Philips Semiconductors
CK00 (100/133MHz) spread spectrum
differential system clock generator
Product specification
PCK2020
PIN DESCRIPTION
PIN NUMBER
1
2, 3
4
5
6
7, 13, 19
8, 9, 11, 12, 14, 15, 17,
18, 20, 21
10, 16, 22
23
24
25, 26
27
28
29, 36
30, 31, 34, 35
32, 33
37
38
39
40, 46
41, 44, 47, 50
42, 45, 48, 51
43, 49
52
53
54
55
56
SYMBOL
VSSRef
Ref0/MultSel0
Ref1/MultSel1
VDD3.3Ref
XTAL_IN
XTAL_OUT
VSSPCI
PCICLK[0–9]
VDD3.3PCI
SEL100/133
VSSUSB
48 MHz/SelA
48 MHz/SelB
VDD3.3USB
PWRDWN
VDD3.3
3V66[0–3]
VSS
VSSCore
VDD3.3Core
I_REF
VSSCPU
CPUCLK[0–3]
CPUCLK[0–3]
VDD3.3CPU
SPREAD
VSSM
3VMref_b
3VMref
VDD3.3M
FUNCTION
During power up, pins functions as a latched inputs that enables MULTSEL0 and
MULTSEL1 prior to the pins being used for output of 3 V at 14.318 MHz. Part must be
clocked to latch data in.
Crystal input
Crystal output
3.3 V PCI clock outputs fixed at 33 MHz.
Select input pin for enabling 133 MHz or 100 MHz CPU outputs.
3.3 V fixed 48 MHz clock outputs. During power up, pins functions as latched inputs
that enables SELA and SELB prior to the pins being used for output of 3 V at 48 MHz.
Part must be clocked to latch data in.
Device enters power down mode when held low. Asserts low.
3.3 V fixed 66 MHz CPU clock outputs.
3.3 V power supply for analog circuits.
This pin controls the reference current for the host pairs. This pin requires a fixed
precision resistor tied to ground in order to establish the correct current.
Enables spread spectrum mode when held low on differential host outputs,
MREF/MREF_B clocks, 66 MHz clocks, and 33 MHz PCI clocks. Asserts low.
3.3 V clock outputs running at 1/2 CPU clock frequency. 66 MHz or 50 MHz depending
on the state of input pin SEL133/100. (Out of phase with 3VMREF output).
3.3 V clock outputs running at 1/2 CPU clock frequency. 66 MHz or 50 MHz depending
on the state of input pin SEL133/100.
3.3 V power supply
2000 Nov 13
3
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