w83194br-655 Winbond Electronics Corp America, w83194br-655 Datasheet - Page 3

• Manufacturer Part Number: w83194br-655
• Description: Clock For Sis Chipsets Winbond Clock Generator
• Manufacturer: Winbond Electronics Corp America

Table of Content-
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2.
3.
4.
5.
6.
7.
GENERAL DESCRIPTION ......................................................................................................... 1
PRODUCT FEATURES .............................................................................................................. 1
PIN CONFIGURATION ............................................................................................................... 2
BLOCK DIAGRAM ...................................................................................................................... 3
PIN DESCRIPTION..................................................................................................................... 4
5.1
5.2
5.3
5.4
5.5
5.6
5.7
FREQUENCY SELECTION BY HARDWARE OR SOFTWARE ................................................ 7
I2C CONTROL AND STATUS REGISTERS .............................................................................. 8
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
7.20
7.21
7.22
Crystal I/O.................................................................................................................................4
CPU, AGP, ZCLK and PCI Clock Outputs ..............................................................................4
Fixed Frequency Outputs.........................................................................................................5
I
Power Management Pins.........................................................................................................6
IREF selects Function ..............................................................................................................6
Power Pins................................................................................................................................6
Register 0: Frequency Select (Default = 20h) .........................................................................8
Register 1: CPU Control (1 = Enable, 0 = Stopped) (Default: E4h) .......................................8
Register 2: PCI, ZCLK Control (1 = Enable, 0 = Stopped) (Default: FFh) .............................9
Register 3: PCI, AGP Control (1 = Enable, 0 = Stopped) (Default: EFh)...............................9
Register 4: 48MHz, REF, SRC Control (1 = Enable, 0 = Stopped) (Default: FFh)................9
Register 5: Watchdog Control (Default: 04h) ........................................................................10
Register 6: Skew Control (Default: 25h) ................................................................................10
Register 7: Winbond Chip ID (Default: 77h) (Read only)......................................................11
Register 8: M/N (Default: 90h) ...............................................................................................11
Register 9: N (Default: BBh)...................................................................................................11
Register 10:N & N3 (Default: 3Bh).........................................................................................12
Register 11: Spread Spectrum Programming (Default: 0Eh) ...............................................12
Register 12: Divisor and Step-less Enable Control (Default: 89h) .......................................12
Register 13: M/N Control (Default: 0Ah)................................................................................13
Register 14: Reserved (Default: 10h) ....................................................................................14
Register 15: Spread Spectrum type Control (Default: 2Ch) .................................................14
Register 16: Skew Control (Default: 24h)..............................................................................15
Register 17: Slew rate Control (Default: 00h)........................................................................15
Register 18: Slew rate Control (Default: 00h)........................................................................15
Register 19: Slew rate Control (Default: D2h) .......................................................................16
Register 20: Watch dog timer (Default: 88h).........................................................................16
Register 21: Fix Control (Default: 00h) ..................................................................................16
2
C Control Interface .................................................................................................................5
W83194BR-655/W83194BG-655
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