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W83194R-KX PDF даташит

Спецификация W83194R-KX изготовлена ​​​​«Winbond» и имеет функцию, называемую «133MHZ 3-DIMM K7 CLOCK».

Детали детали

Номер произв W83194R-KX
Описание 133MHZ 3-DIMM K7 CLOCK
Производители Winbond
логотип Winbond логотип 

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W83194R-KX Даташит, Описание, Даташиты
W83194R-KX
133MHZ 3-DIMM K7 CLOCK
1.0 GENERAL DESCRIPTION
The W83194R-KX is a clock generator which provides all clocks required for AMD K7 system.
W83194R-KX provides one differential pair CPU clock open drain outputs up to 143MHz which are
externally selectable with smooth transitions. W83194R-KX also provides 6 PCI clocks and 13
SDRAM clocks controlled by the none-delay buffer_in pin.
The W83194R-KX accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.
Spread spectrum built in at ±0.5% or ±0.25% to reduce EMI. Programmable stopping individual clock
outputs and frequency selection through I2C interface. The device meets the Pentium power-up
stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up.
High drive six PCI and thirteen SDRAM CLOCK outputs typically provide greater than 1 V /ns slew
rate into 30 pF loads. Two CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20
pF loads, when maintaining 50± 5% duty cycle. The fixed frequency outputs, such as REF, 24MHz,
and 48 MHz provide better than 0.5V /ns slew rate.
2.0 PRODUCT FEATURES
Supports AMD K7 CPU with I2C.
One pair of differential CPU clocks
One chipset clock
13 SDRAM clocks for 3 DIMMs
6 PCI synchronous clocks
Optional single or mixed supply:
(Vddq3=Vddq2 =3.3V) or (Vddq3 = 3.3V, Vddq2 = 2.5V)
< 250ps skew among CPU clocks
< 250ps skew among PCI clocks
< 5ns propagation delay SDRAM from buffer input
Skew from CPU(earlier) to PCI clock 1.5 to 4ns, center 2.6ns.
Smooth frequency switch with selections from 66.8 MHz to 143 MHz CPU
I2C 2-Wire serial interface and I2C read back
± 0.25% or ± 0.5% spread spectrum function to reduce EMI
Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
One 48 MHz for USB & one 24 MHz for super I/O
48-pin SSOP package
Publication Release Date: Nov. 1999
- 1 - Revision 0.35









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W83194R-KX Даташит, Описание, Даташиты
W83194R-KX
PRELIMINARY
3.0 BLOCK DIAGRAM
Xin
Xout
PD#
FS(0:3)* 4
MODE*
SDATA*
SDCLK*
BUFFER IN
PLL2
~~
XTAL
OSC
1/2
PLL1
Spread
Spectrum
LATCH
~
POR
4
Config.
Reg.
STOP
PCI
Clock
Divider
48MHz
24_48MHz
REF0/CPU_STOP#
REF1
CPUT_CS
CPUT0
CPUC0
PCICLK(0:5)
6
SDRAM(0:12)
13
4.0 PIN CONFIGURATION
Publication Release Date: Nov. 1999
- 2 - Revision 0.35









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W83194R-KX Даташит, Описание, Даташиты
Vddq3
CPU_STOP#/REF0
Vss
Xin
Xout
Vddq3
PCICLK0/MODE*
PCICLK1/FS1*
Vss
PCICLK2
PCICLK3
PCICLK4
PCICLK5
Vddq3
BUFFER IN
Vss
SDRAM11
SDRAM10
Vddq3
SDRAM 9
SDRAM 8
Vss
SDATA*
SDCLK*
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
W83194R-KX
PRELIMINARY
48 REF1/FS0*
47 Vss
46 CPUT_CS
45 Vss
44 CPUC0
43 CPUT0
42 VddQ2
41 PD#
40 SDRAM12
39 Vss
38 SDRAM 0
37 SDRAM 1
36 Vddq3
35 SDRAM 2
34 SDRAM 3
33 Vss
32 SDRAM 4
31 SDRAM 5
30 Vddq3
29 SDRAM 6
28 SDRAM 7
27 Vddq3
26 48MHz/FS2*
25 24_48MHz/FS3*
5.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
# - Active Low
* - Internal 250kpull-up
5.1 Crystal I/O
SYMBOL
Xin
Xout
PIN I/O
FUNCTION
4 IN Crystal input with internal loading capacitors and
feedback resistors.
5 OUT Crystal output at 14.318MHz nominally.
5.2 CPU, SDRAM, PCI, IOAPIC Clock Outputs
SYMBOL
CPUT_CS
CPU_C0
CPU_T0
PIN I/O
FUNCTION
46 OD CPU_C0 and CPU_T0 are the differential open drain
44 CPU clocks for K7. CPUT_CS is the open drain pin
43 for the chipset. It has the same phase relationship as
CPU_T0.
Publication Release Date: Nov. 1999
- 3 - Revision 0.35










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