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W83194AR-W Schematic ( PDF Datasheet ) - Winbond

Teilenummer W83194AR-W
Beschreibung 150MHZ CLOCK FOR WHITNEY CHIPSET
Hersteller Winbond
Logo Winbond Logo 




Gesamt 12 Seiten
W83194AR-W Datasheet, Funktion
W83194AR-W
150MHZ CLOCK FOR WHITNEY CHIPSET
1.0 GENERAL DESCRIPTION
The W83194AR-W is a Clock Synthesizer for Intel Whitney chipset. W83194AR-W 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 W83194AR-W provides I2C serial bus interface to program the registers to enable or disable
each clock outputs and provides 0.5% and 0.75% center type spread spectrum to reduce EMI.
The W83194AR-W 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¡Ó 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
9 SDRAM clocks for 2 DIMMs
8 PCI synchronous clocks.
Optional single or mixed supply:
(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddA=VddC=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 150MHz
I2C 2-Wire serial interface and I2C read back
0.5% and 0.75% 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
48-pin SSOP package
Publication Release Date: May. 1999
- 1 - Revision 0.50






W83194AR-W Datasheet, Funktion
W83194AR-W
6.0 SERIAL CONTROL 0REGISTERS
PRELIMINARY
The Pin column lists the affected pin number and the @PowerUp column gives the state at true
power up. Registers are set to the values shown only on true power up. "Command Code" byte and
"Byte Count" byte must be sent following the acknowledge of the Address Byte. Although the data
(bits) in these two bytes are considered "don't care", they must be sent and will be acknowledge.
After that, the below described sequence (Register 0, Register 1, Register 2, ....) will be valid and
acknowledged.
Frequency Table Setting by I2C (SEL5 ~ SEL0)
SEL5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SEL4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SEL3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
SEL2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
SEL1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
SEL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU
(MHz)
83.3
90
75
150
138
95.25
129
124
119
114
110
105
66.8
100.2
133.6
133.3
125
127
130
72
140
136
145
155
121
117
112
107
66.8
100.2
100.9
133.3
SDRAM
(MHz)
125
90
113
150
138
95.25
129
124
119
114
110
105
100.2
100.2
100.2
133.3
125
127
130
108
140
136
145
155
121
117
112
107
100.2
100.2
100.9
133.3
3V66
(MHz)
83
60
75
75
69
63.5
86
83
80
76
73.3
70
66.8
66.8
66.7
66.7
83.33
84.67
86.67
72
70
68
73
78
81
78
75
71
66.8
66.8
67.3
66.7
PCI
(MHz)
41.7
30
37.7
37.5
34.6
31.75
43
41.4
39.8
38
36.7
35
33.4
33.3
33.6
33.3
41.67
42.34
43.33
36.1
35.1
33.9
36.3
38.8
40.5
38.9
37.3
35.7
33.4
33.4
33.6
33.3
IOAPIC
(MHz)
20.85
15
18.85
18.75
17.3
15.88
21.5
20.7
19.9
19
18.35
17.5
16.7
16.7
16.8
16.7
20.83
21.17
21.67
18.05
17.55
16.95
18.15
19.4
20.25
19.45
18.65
17.85
16.7
16.7
16.8
16.7
Publication Release Date: May. 1999
- 6 - Revision 0.50

6 Page









W83194AR-W pdf, datenblatt
9.0 PACKAGE DRAWING AND DIMENSIONS
W83194AR-W
PRELIMINARY
Headquarters
No. 4, Creation Rd. III
Science-Based Industrial Park
Hsinchu, Taiwan
TEL: 886-35-770066
FAX: 886-35-789467
www: http://www.winbond.com.tw/
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II
123 Hoi Bun Rd., Kwun Tong
Kowloon, Hong Kong
TEL: 852-27516023-7
FAX: 852-27552064
Winbond Electronics
(North America) Corp.
2730 Orchard Parkway
San Jose, CA 95134 U.S.A.
TEL: 1-408-9436666
FAX: 1-408-9436668
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.
Taipei, Taiwan
TEL: 886-2-7190505
FAX: 886-2-7197502
TLX: 16485 WINTPE
Please note that all data and specifications are subject to change without notice. All the trade
marks of products and companies mentioned in this data sheet belong to their respective
owners.
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury.
Winbond customers using or selling these products for use in such applications do so at their
own risk and agree to fully indemnify Winbond for any damages resulting from such improper
use or sale.
- 12 -
Publication Release Date: May. 1999
Revision 0.50

12 Page





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