http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Cypress Semiconductor Electronic Components Datasheet

W150 Datasheet

440BX AGPset Spread Spectrum Frequency Synthesizer

No Preview Available !

W150 pdf
PRELIMINARY
W150
440BX AGPset Spread Spectrum Frequency Synthesizer
Features
• Maximized EMI suppression using Cypress’s Spread
Spectrum Technology
• Single chip system frequency synthesizer for Intel®
440BX AGPset
• Three copies of CPU output
• Seven copies of PCI output
• One 48-MHz output for USB / One 24-MHz for SIO
• Two buffered reference outputs
• Two IOAPIC outputs
• 17 SDRAM outputs provide support for 4 DIMMs
• Supports frequencies up to 150 MHz
• I2C™ interface for programming
• Power management control inputs
Key Specifications
CPU Cycle-to-Cycle Jitter: ......................................... 250 ps
CPU to CPU Output Skew: ........................................ 175 ps
PCI to PCI Output Skew: ............................................ 500 ps
SDRAMIN to SDRAM0:15 Delay: ..........................3.7 ns typ.
VDDQ3: .................................................................... 3.3V±5%
VDDQ2: .................................................................... 2.5V±5%
SDRAM0:15 (leads) to SDRAM_F Skew: ..............0.4 ns typ.
Table 1. Mode Input Table
Mode
0
1
Pin 3
PCI_STOP#
REF0
Table 2. Pin Selectable Frequency
Input Address
CPU_F, 1:2
FS3 FS2 FS1 FS0
(MHz)
111 1
133.3
111 0
124
110 1
150
110 0
140
101 1
105
101 0
110
100 1
115
100 0
120
011 1
100
011 0
133.3
010 1
112
010 0
103
001 1
66.8
001 0
83.3
000 1
75
000 0
124
PCI_F, 0:5
(MHz)
33.3 (CPU/4)
31 (CPU/4)
37.5 (CPU/4)
35 (CPU/4)
35 (CPU/3)
36.7 (CPU/3)
38.3 (CPU/3)
40 (CPU/3)
33.3 (CPU/3)
44.43 (CPU/3)
37.3 (CPU/3)
34.3 (CPU/3)
33.4 (CPU/2)
41.7 (CPU/2)
37.5 (CPU/2)
41.3 (CPU/3)
Logic Block Diagram
X1
X2
CLK_STOP#
XTAL
OSC
PLL Ref Freq
I/O Pin
Control
Stop
Clock
Control
PLL 1
Stop
Clock
Control
÷2,3,4
SDATA
SCLK
I2C
Logic
Stop
Clock
Control
SDRAMIN
PLL2
Stop
Clock
Control
VDDQ3
REF0/(PCI_STOP#)
REF1/FS2
VDDQ2
IOAPIC_F
IOAPIC0
VDDQ2
CPU_F
CPU1
CPU2
VDDQ3
PCI_F/MODE
PCI0/FS3
PCI1
PCI2
PCI3
PCI4
PCI5
VDDQ3
48MHz/FS1
24MHz/FS0
VDDQ3
SDRAM0:15
16 SDRAM_F
Pin Configuration[1]
VDDQ3
REF1/FS2
REF0/(PCI_STOP#)
GND
X1
X2
VDDQ3
PCI_F/MODE
PCI0/FS3
GND
PCI1
PCI2
PCI3
PCI4
VDDQ3
PCI5
SDRAMIN
SDRAM11
SDRAM10
VDDQ3
SDRAM9
SDRAM8
GND
SDRAM15
SDRAM14
GND
SDATA
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56 VDDQ2
55 IOAPIC0
54 IOAPIC_F
53 GND
52 CPU_F
51 CPU1
50 VDDQ2
49 CPU2
48 GND
47 CLK_STOP#
46 SDRAM_F
45 VDDQ3
44 SDRAM0
43 SDRAM1
42 GND
41 SDRAM2
40 SDRAM3
39 SDRAM4
38 SDRAM5
37 VDDQ3
36 SDRAM6
35 SDRAM7
34 GND
33 SDRAM12
32 SDRAM13
31 VDDQ3
30 24MHz/FS0
29 48MHz/FS1
Intel is a registered trademark of Intel Corporation. I2C is a trademark of Philips Corporation.
Note:
1. Internal pull-up resistors should not be relied upon for setting I/O pins HIGH. Pin function with parentheses determined by MODE pin resistor strapping.
Unlike other I/O pins, input FS3 has an internal pull-down resistor.
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
February 10, 2000, rev. *A


Cypress Semiconductor Electronic Components Datasheet

W150 Datasheet

440BX AGPset Spread Spectrum Frequency Synthesizer

No Preview Available !

W150 pdf
PRELIMINARY
W150
Pin Definitions
Pin Name
Pin No.
Pin
Type
Pin Description
CPU1:2
CPU_F
PCI1:5
PCI0/FS3
51, 49
52
11, 12, 13, 14,
16
9
PCI_F/MODE
CLK_STOP#
IOAPIC_F
IOAPIC0
8
47
54
55
O CPU Outputs 1 and 2: Frequency is set by the FS0:3 inputs or through serial input
interface, see Tables 2 and 6. These outputs are affected by the CLK_STOP# input.
O Free-Running CPU Output: Frequency is set by the FS0:3 inputs or through serial
input interface, see Tables 2 and 6. This output is not affected by the CLK_STOP# input.
O PCI Outputs 1 through 5: Frequency is set by the FS0:3 inputs or through serial input
interface, see Tables 2 and 6. These outputs are affected by the PCI_STOP# input.
I/O PCI Output/Frequency Select Input: As an output, frequency is set by the FS0:3
inputs or through serial input interface, see Tables 2 and 6. This output is affected by
the PCI_STOP# input. When an input, latches data selecting the frequency of the CPU
and PCI outputs.
I/O Free Running PCI Output: Frequency is set by the FS0:3 inputs or through serial input
interface, see Tables 2 and 6. This output is not affected by the PCI_STOP# input. When
an input, selects function of pin 3 as described in Table 1.
I CLK_STOP# Input: When brought LOW, affected outputs are stopped LOW after com-
pleting a full clock cycle (23 CPU clock latency). When brought HIGH, affected outputs
start beginning with a full clock cycle (23 CPU clock latency).
O Free-running IOAPIC Output: This output is a buffered version of the reference input
which is not affected by the CPU_STOP# logic input. Its swing is set by voltage applied
to VDDQ2.
I/O IOAPIC Output: Provides 14.318-MHz fixed frequency. The output voltage swing is set
by voltage applied to VDDQ2. This output is disabled when CLK_STOP# is set LOW.
48MHz/FS1
24MHz/FS0
29 I/O 48-MHz Output: 48 MHz is provided in normal operation. In standard systems, this
output can be used as the reference for the Universal Serial Bus. Upon power up, FS1
input will be latched, setting output frequencies as described in Table 2.
30 I/O 24-MHz Output: 24 MHz is provided in normal operation. In standard systems, this
output can be used as the clock input for a Super I/O chip. Upon power up, FS0 input
will be latched, setting output frequencies as described in Table 2.
REF1/FS2
2 I/O Reference Output: 14.318 MHz is provided in normal operation. Upon power-up, FS2
input will be latched, setting output frequencies as described in Table 2.
REF0
3 I/O Fixed 14.318-MHz Output 0 or PCI_STOP# Pin: Function determined by MODE pin.
(PCI_STOP#)
The PCI_STOP# input enables the PCI 0:5 outputs when HIGH and causes them to
remain at logic 0 when LOW. The PCI_STOP signal is latched on the rising edge of
PCI_F. Its effects take place on the next PCI_F clock cycle. As an output, this pin
provides a fixed clock signal equal in frequency to the reference signal provided at the
X1/X2 pins (14.318 MHz).
SDRAMIN
17 I Buffered Input Pin: The signal provided to this input pin is buffered to 17 outputs
(SDRAM0:15, SDRAM_F).
SDRAM0:15 44, 43, 41, 40,
Buffered Outputs: These sixteen dedicated outputs provide copies of the signal pro-
39, 38, 36, 35, O vided at the SDRAMIN input. The swing is set by VDDQ3, and they are deactivated
22, 21, 19, 18,
when CLK_STOP# input is set LOW.
33, 32, 25, 24
SDRAM_F
SCLK
SDATA
46 O Free-Running Buffered Output: This output provides a single copy of the SDRAMIN
input. The swing is set by VDDQ3; this signal is unaffected by the CLK_STOP# input.
28 I Clock pin for I2C circuitry.
27 I/O Data pin for I2C circuitry.
X1 5 I Crystal Connection or External Reference Frequency Input: This pin has dual func-
tions. It can be used as an external 14.318MHz crystal connection or as an external
reference frequency input.
X2 6 I Crystal Connection: An input connection for an external 14.318-MHz crystal. If using
an external reference, this pin must be left unconnected.
VDDQ3
1, 7, 15, 20,
31, 37, 45
P Power Connection: Power supply for core logic, PLL circuitry, SDRAM output buffers,
PCI output buffers, reference output buffers, and 48-MHz/24-MHz output buffers. Con-
nect to 3.3V.
2


Part Number W150
Description 440BX AGPset Spread Spectrum Frequency Synthesizer
Maker Cypress Semiconductor
Total Page 14 Pages
PDF Download
W150 pdf
Download PDF File
W150 pdf
View for Mobile






Related Datasheet

1 W15 15 Watt - Single Output Regulated Power Supplies ETC
ETC
W15 pdf
2 W150 440BX AGPset Spread Spectrum Frequency Synthesizer Cypress Semiconductor
Cypress Semiconductor
W150 pdf
3 W1505 Precision Thin Film Chip Resistors TT electronics
TT electronics
W1505 pdf
4 W150NF55 STW150NF55 STMicroelectronics
STMicroelectronics
W150NF55 pdf
5 W152 Spread Aware/ Eight Output Zero Delay Buffer Cypress Semiconductor
Cypress Semiconductor
W152 pdf
6 W1520NC500 Rectifier Diode IXYS
IXYS
W1520NC500 pdf
7 W1520NC520 Rectifier Diode IXYS
IXYS
W1520NC520 pdf
8 W1520NC540 Rectifier Diode IXYS
IXYS
W1520NC540 pdf
9 W1520NC560 Rectifier Diode IXYS
IXYS
W1520NC560 pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components