W83194BR-PT Просмотр технического описания (PDF) - Winbond
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W83194BR-PT Datasheet PDF : 24 Pages
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W83194BR-PT
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 1
2. PRODUCT FEATURES .............................................................................................................. 1
3. PIN CONFIGURATION ............................................................................................................... 2
4. BLOCK DIAGRAM ...................................................................................................................... 2
5. PIN DESCRIPTION..................................................................................................................... 3
5.1
Crystal I/O .............................................................................................................................3
5.2
CPU, AGP, and PCI, IOAPIC Clock Outputs ......................................................................3
5.3
I2C Control Interface .............................................................................................................4
5.4
Fixed Frequency Outputs.....................................................................................................4
5.5
Power Management Pins.....................................................................................................4
5.6
Power Pins............................................................................................................................5
5.7
MULTSEL [1:0] selects Function .........................................................................................5
6. FREQUENCY SELECTION BY HARDWARE OR SOFTWARE ................................................ 6
7.
I2C CONTROL AND STATUS REGISTERS............................................................................... 7
7.1
Register 0: Frequency Select (Default = C4h) ....................................................................7
7.2
Register 1: CPU Clock Control (1 = Enable, 0 = Stopped) (Default = E3h) .......................7
7.3
Register 2: PCI Clock Control (1 = Enable, 0 = Stopped) (Default = FFh).........................8
7.4
Register 3: PCI, REF, 48MHz Clock Control (1 = Enable, 0 = Stopped) (Default = F8h) ..............8
7.5
Register 4:MULTISEL1 IOAPIC, AGP Control (1 = Enable, 0 = Stopped) (Default = 7Fh) ...........8
7.6
Register 5: Watchdog Control (Default = 80h) ....................................................................9
7.7
The Register 6, 7 is reserved for Buffer...............................................................................9
7.8
Register 8: Watchdog Timer (Default = 08h).......................................................................9
7.9
Register 9: M/N Program (Default = ADh)...........................................................................9
7.10 Register 10: M/N Program (Default = 67h)........................................................................10
7.11 Register 11: Spread Spectrum Programming (Default = 1Fh) .........................................10
7.12 Register 12: Divisor and Step-less Enable Control (Default = 08h) .................................10
7.13 Register 13: CPU to IOAPIC Skew Control (Default = A7h).............................................12
7.14 Register 14: CPU to PCI and IOAPIC Skew Control (Default = 90h)...............................12
7.15 Register 15: SEL24_48 and CPU to CPUCS skew Control (Default = 04h)....................12
7.16 Register 16: 24, 48, PCI Slew rate control (Default = FFh) ..............................................13
7.17 Register 17: PCI, AGP, REF Slew rate control (Default = FCh).......................................13
7.18 Register 18: IOAPIC, CPUCS Slew rate control (Default = FFh) .....................................13
7.19 Register 19: Winbond Chip ID (Read Only) (Default = 81h).............................................14
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