W83194BR-703 Просмотр технического описания (PDF) - Winbond

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W83194BR-703

STEPLESS CLOCK FOR SIS 741 CHIPSET

Winbond 

W83194BR-703/W83194BG-703

Table of Content-

1. GENERAL DESCRIPTION ......................................................................................................... 1

2. PRODUCT FEATURES .............................................................................................................. 1

3. PIN CONFIGURATION ............................................................................................................... 2

4. BLOCK DIAGRAM ...................................................................................................................... 3

5. PIN DESCRIPTION..................................................................................................................... 4

5.1 Crystal I/O.................................................................................................................................4

5.2 CPU, AGP, ZCLK and PCI, IOAPIC Clock Outputs ...............................................................4

5.3 Fixed Frequency Outputs.........................................................................................................5

5.4 I2C Control Interface ................................................................................................................5

5.5 Power Management Pins.........................................................................................................5

5.6 Power Pins................................................................................................................................6

6. FREQUENCY SELECTION BY HARDWARE OR SOFTWARE ................................................ 7

7.

I2C CONTROL AND STATUS REGISTERS............................................................................... 8

7.1 Register 0: Frequency Select (Default = 20h) .........................................................................8

7.2 Register 1: CPU Control (1 = Enable, 0 = Stopped) (Default: ECh).......................................8

7.3 Register 2: PCI, ZCLK Control (1 = Enable, 0 = Stopped) (Default: FFh) .............................9

7.4 Register 3: PCI, AGP Control (1 = Enable, 0 = Stopped) (Default: FFh) ...............................9

7.5 Register 4: 48MHz, REF, SRC Control (1 = Enable, 0 = Stopped) (Default: FFh)................9

7.6 Register 5: Watchdog Control (Default: 04h) ........................................................................10

7.7 Register 6: Skew Control (Default: 25h) ................................................................................10

7.8 Register 7: Winbond Chip ID (Default: 77h) (Read only)......................................................11

7.9 Register 8: M/N (Default: 90h) ...............................................................................................11

7.10 Register 9: N (Default: BBh)...................................................................................................11

7.11 Register 10: N & N3 (Default: 3Bh)........................................................................................12

7.12 Register 11: Spread Spectrum Programming (Default: 0Eh) ...............................................12

7.13 Register 12: Divisor and Step-less Enable Control (Default: 89h) .......................................12

7.14 Register 13: M/N Control (Default: 0Ah)................................................................................13

7.15 Register 14: Spread Spectrum Control (Default: 10h) ..........................................................14

7.16 Register 15: Spread Spectrum type Control (Default: 2Ch) .................................................14

7.17 Register 16: Skew Control (Default: 24h)..............................................................................15

7.18 Register 17: Slew rate Control (Default: 00h)........................................................................15

7.19 Register 18: Slew rate Control (Default: 00h)........................................................................15

7.20 Register 19: Slew rate Control (Default: D2h) .......................................................................16

7.21 Register 20: SRC select Control (Default: 88h) ....................................................................16

7.22 Register 21: Fix Mode Control (Default: 00h)........................................................................17

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