The W83194BR-730 is a Clock Synthesizer which provides all clocks required for high-speed RISC or
CISC microprocessor such as AMD K7. W83194BR-730 provides 64 CPU/PCI frequencies which are
selectable with smooth transitions by hardware or software. W83194BR-730 also provides 13 SDRAM
clocks.
The W83194BR-730 provides step-less frequency programming by controlling the VCO freq. and the
programmable PCI clock output divisor ratio. A watch dog timer is quipped and when time out, the
RESET# pin will output 4ms pulse signal.
The W83194BR-730 accepts a 14.318 MHz reference crystal as its input. Spread spectrum built in at
0~-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. Using dual function pin for the slots(ISA, PCI,
CPU, DIMM) is not recommend.
2.0 PRODUCT FEATURES
•
Supports AMD CPU with I2C.
•
3 CPU clocks (one free-running CPU clock)
•
13 SDRAM clocks for 3 DIMMs
•
6 PCI synchronous clocks
•
2 AGP clocks
•
2 REF clocks as 14.318MHz outputs
•
< 250ps skew among CPU and SDRAM clocks
•
< 250ps skew among PCI clocks
•
Skew from CPU(earlier) to PCI clock 1 to 4ns, center 2.6ns.
• Smooth frequency switch with selections from 66 MHz to 200 MHz CPU
•
Stepless frequency programming by controlling the VCO freq. and the clock output divisor ratio
•
Programmable skew for CPU to SDRAM and CPU to AGP clock outputs
•
I2C 2-Wire serial interface and I2C read back
•
±0.25% or 0~-0.5% spread spectrum function to reduce EMI
•
Programmable registers to enable/stop each output and select modes
•
MODE pin for power Management and RESET# out when system hang
48MHz / &FS0 20 I/O 48MHz output for USB during normal operation.
Latched input for FS0 at initial power up for H/W
selecting the output frequency of CPU, SDRAM and
PCI clocks.
4.5 Power Pins
SYMBOL PIN FUNCTION
VddR 1 Power supply for Ref [0:1] crystal and core logic.
VddAGP 15 Power supply for AGP output, 3.3V.
VddLCPU 48 Power supply for CPUC0,T0,CS_C1, either 2.5V or 3.3V.
VddP 7 Power supply for PCICLK[0:5], 3.3V.
VddSD 43,35,29,25 Power supply for SDRAM[0:12], and CPU PLL core,
Vdd48 19 Power for 24 & 48MHz output buffers and fixed PLL core.
Vss 4,14,18,19,29,32,39,44 Circuit Ground.
The Pin column lists the affected pin number and the @PowerUp column gives the default state at 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 sequence described below (Register 0, Register 1,
Register 2, ....) will be valid and acknowledged.
Bytes sequence order for I2C controller :
Clock Address
A(6:0) & R/W
Ack
8 bits dummy
Command code
Ack
8 bits dummy
Byte count
Set R/W to 1 when Read back”, the data sequence is as follows :
7 0 - SSEL5 ( Frequency table selection by software via I2C)
6 0 - SSEL4 ( Frequency table selection by software via I2C)
5 0 - SSEL3 ( Frequency table selection by software via I2C)
4 0 - SSEL2 ( Frequency table selection by software via I2C)
3 0 - SSEL1 ( Frequency table selection by software via I2C)
2 0 - SSEL0 (Frequency table selection by software via I2C )
1 0 - 0 = Selection by hardware
7 1 - CSkew2 (SDRAM to CPU skew program bit)
6 0 - CSkew1 (SDRAM to CPU skew program bit)
5 0 - CSkew0 (SDRAM to CPU skew program bit)
4 1 - CAkew2 (AGP to CPU skew program bit)
3 0 - CAkew1 (AGP to CPU skew program bit)
2 0 - CAkew0 (AGP to CPU skew program bit)
1 1 21 24_48MHz(Active / Inactive)
0 1 20 48MHz(Active / Inactive)
- 9 - Revision 0.60
Description
Publication Release Date:Oct. 2000
Page 10
5.7 Register 6: Watchdog Timer Register
W83194BR-730
PRELIMINARY
Bit @PowerUp Pin
7 0 - Enable Count 1 = start timer
0 = stop timer
6 X - Second timeout status (READ ONLY)
5 0 - Second count 5
4 0 - Second count 4
3 0 - Second count 3
2 0 - Second count 2
1 0 - Second count 1
0 0 - Second count 0
Description
5.8 Register 7: M/N Program Register and Divisor
Bit @PowerUp Pin
7 0 - N value bit 8
6
5
4 0 - M value bit 4
3 0 - M value bit 3
2 0 - M value bit 2
1 0 - M value bit 1
0 0 - M value bit 0
1 - Test 1 (Internal test use)
0 - Test 0 (Internal test use)
Description
5.9 Register 8: M/N Program Register
Bit @PowerUp Pin
7 0 - N value bit 7
6 0 - N value bit 6
5 0 - N value bit 5
4 0 - N value bit 4
3 0 - N value bit 3
2 0 - N value bit 2
1 0 - N value bit 1
0 0 - N value bit 0
Description
Publication Release Date:Oct. 2000
- 10 - Revision 0.60
Page 11
5.10 Register 9: Spread Spectrum Register
W83194BR-730
PRELIMINARY
Bit @PowerUp Pin
7 0 - Spread spectrum up count 3
6 0 - Spread spectrum up count 2
5 0 - Spread spectrum up count 1
4 0 - Spread spectrum up count 0
3 0 - Spread spectrum down count 3
2 0 - Spread spectrum down count 2
1 0 - Spread spectrum down count 1
0 0 - Spread spectrum down count 0
Description
5.11 Register 10: Divisor Register
Bit @PowerUp Pin
7 0 - 0: use frequency table
1: use M/N register to program frequency
The equation is
6 X - Ratio SEL3 (See ratio selection table)
5 X - Ratio SEL2 (See ratio selection table)
4 X - Ratio SEL1 (See ratio selection table)
3 X - Ratio SEL0 (See ratio selection table)
2 X - AGP Ratio SEL2 (See ratio selection table1)
1 X - AGP Ratio SEL1 (See ratio selection table1)
0 X - AGP Ratio SEL0 (See ratio selection table1)
VCO freq. = 14.318MHz * (N+4)/ M
Description
5.12 Register 11: Winbond Chip ID Register (Read Only)
Bit @PowerUp Pin
7 0 - Winbond Chip ID
6 0 - Winbond Chip ID
5 0 - Winbond Chip ID
4 0 - Winbond Chip ID
3 0 - Winbond Chip ID
2 1 - Winbond Chip ID
1 0 - Winbond Chip ID
0 1 - Winbond Chip ID
- 11 - Revision 0.60
Description
Publication Release Date:Oct. 2000
Page 12
5.13 Register 12: Winbond Chip ID Register (Read Only)
W83194BR-730
PRELIMINARY
Bit @PowerUp Pin
7 0 - Winbond Chip ID
6 0 - Winbond Chip ID
5 1 - Winbond Chip ID
4 1 - Winbond Chip ID
3 0 - Version ID
2 0 - Version ID
1 0 - Version ID
0 1 - Version ID
1st line: Winbond logo and the type number: W83194BR-730
2nd line: Tracking code 2 8051234
2
A: Internal use code
B
8051234
3rd line: Tracking code 814 G B B
G: assembly house ID; O means OSE, G means GR
002GAB
: wafers manufactured in Winbond FAB 2
: wafer production series lot number
002
: packages made in '00, week 02
: IC revision
W83194BR-730
PRELIMINARY
Commercial, 0°C to +70°C
All the trade marks of products and companies mentioned in this data sheet
belong to their respective owners
.
Publication Release Date:Oct. 2000
- 13 - Revision 0.60
Page 14
PACKAGE DRAWING AND DIMENSIONS
W83194BR-730
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/
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.
Taipei, Taiwan
TEL: 886-2-7190505
FAX: 886-2-7197502
TLX: 16485 WINTPE
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
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.
Publication Release Date:Oct. 2000
- 14 - Revision 0.60
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