W83195BR-S PDF даташит
Спецификация W83195BR-S изготовлена «Winbond» и имеет функцию, называемую «STEPLESS 200MHZ 3-DIMM CLOCK FOR SOLANO CHIPSET». |
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Детали детали
Номер произв | W83195BR-S |
Описание | STEPLESS 200MHZ 3-DIMM CLOCK FOR SOLANO CHIPSET |
Производители | Winbond |
логотип |
10 Pages
No Preview Available ! |
W83195BR-S
STEPLESS 200MHZ 3-DIMM CLOCK FOR SOLANO CHIPSET
1.0 GENERAL DESCRIPTION
The W83195BR-S is a Clock Synthesizer for Intel 815 Solano chipset. W83195BR-S provides all
clocks required for high-speed RISC or CISC microprocessor and also provides 64 different
frequencies of CPU, SDRAM, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally
selectable with smooth transitions.
The W83195BR-S provides I2C serial bus interface to program the registers to enable or disable each
clock outputs and provides 0.25% and 0.5% center type spread spectrum to reduce EMI. A watch
dog timer is quipped and when time out, the RESET# pin will output 4ms pulse signal.
The W83195BR-S provides stepless frequency programming by controlling the VCO freq. and the
clock output divisor ratio. Also the skew of CPU, SDRAM and 3V66 clock outputs are programmable.
The W83195BR-S accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.
High drive PCI and SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30
pF loads. CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads as
maintaining 50± 5% duty cycle. The fixed frequency outputs as REF, 24MHz, and 48 MHz provide
better than 0.5V /ns slew rate.
2.0 PRODUCT FEATURES
• 2 CPU clocks
• 3 3V66 for chipset and AGP clocks
• 12 SDRAM clocks for 3 DIMMs
• 8 PCI synchronous clocks.
• Optional single or mixed supply:
(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddLAPIC=VddLCPU=2.5V)
• Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns
• Smooth frequency switch with selections from 66.8 to 200 MHz
• I2C 2-Wire serial interface and I2C read back
• 0.25% and 0.5% center type spread spectrum
• Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
• Two 48 MHz pins for USB
• 24 MHz for super I/O
• 56-pin SSOP package
Publication Release Date: June 2000
- 1 - Revision 0.42
No Preview Available ! |
3.0 PIN CONFIGURATION
Vss
Vdd3
REF2X/ *FS3
Xin
Xout
Vdd3
3V66-0
3V66-1
3V66-2
Vss3
PCICLK0^/ *FS0
PCICLK1^/ *FS1
PCICLK2^/*FS2
VssP
PCICLK3^/Mode1*
PCICLK4^
Vdd3
PCICLK5^
PCICLK6^
PCICLK7
Vss48
48MHz_0
48MHz_1/ FS4*
SIO_SEL*/24_48MHz
Vdd3
*SDATA
VssS
Vdd3
*: interanl pull-up
#:active low input
^:1.5X~2X strength
$: open drain
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
W83195BR-S
PRELIMINARY
56 Vdd2
55 IOAPIC
54 Vss
53 VddLCPU
52 CPUCLK0
51 CPUCLK1
50 VssC
49 SDRAM 0
48 SDRAM 1
47 SDRAM 2
46 Vdd3
45 VssS
44 SDRAM 3
43 SDRAM 4
42 SDRAM 5
41 SDRAM 6
40 Vdd3
39 VssS
38 SDRAM 7
37 SDRAM 8
36 SDRAM 9
35 SDRAM 10
34 Vdd3
33 VssS
32 SDRAM 11
31 SDRAM 12
30 PD#/RESET$
29 *SDCLK
Publication Release Date: June 2000
- 2 - Revision 0.42
No Preview Available ! |
W83195BR-S
PRELIMINARY
4.0 FREQUENCY SELECTION BY HARDWARE
FS4 FS3 FS2 FS1 FS0 CPU(MHz)
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
11111
75.30
95.00
129.00
150.00
150.00
110.00
140.00
144.00
68.30
105.00
138.00
140.00
66.80
100.20
133.60
133.60
157.30
160.00
146.00
122.00
127.00
122.00
117.00
114.00
80.00
78.00
166.00
160.00
66.60
100.00
133.30
133.30
SDRAM
(MHz)
112.95
95.00
129.00
113.00
150.00
110.00
140.00
108.00
102.45
105.00
138.00
105.00
100.20
100.20
133.60
100.20
118.00
120.00
110.00
91.50
127.00
122.00
117.00
114.00
120.00
117.00
166.00
160.00
100.00
100.00
133.30
100.00
3V66(MHz)
75.30
63.33
86.00
75.33
75.00
73.33
70.00
72.00
68.30
70.00
69.00
70.00
66.80
66.80
66.80
66.80
78.67
80.00
73.33
61.00
84.67
81.33
78.00
76.00
80.00
78.00
83.00
80.00
66.67
66.67
66.65
66.67
PCI(MHz) IOAPIC (MHz)
37.65
31.67
43.00
37.67
37.50
36.67
35.00
36.00
34.15
35.00
34.50
35.00
33.40
33.40
33.40
33.40
39.33
40.00
36.67
30.50
42.33
40.67
39.00
38.00
40.00
39.00
41.50
40.00
33.33
33.33
33.33
33.33
18.83
15.83
21.50
18.83
18.75
18.33
17.50
18.00
17.08
17.50
17.25
17.50
16.70
16.70
16.70
16.70
19.67
20.00
18.33
15.25
21.17
20.33
19.50
19.00
20.00
19.50
20.75
20.00
16.67
16.67
16.66
16.67
Publication Release Date: June 2000
- 3 - Revision 0.42
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