w83194br-323 Winbond Electronics Corp America, w83194br-323 Datasheet - Page 3

• Manufacturer Part Number: w83194br-323
• Description: Clock For Intel Chipsets
• Manufacturer: Winbond Electronics Corp America

Table of Content-
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
GENERAL DESCRIPTION ......................................................................................................... 1
PRODUCT FEATURES .............................................................................................................. 1
BLOCK DIAGRAM ...................................................................................................................... 2
PIN CONFIGURATION ............................................................................................................... 2
PIN DESCRIPTION..................................................................................................................... 3
5.1
5.2
5.3
5.4
5.5
FREQUENCY SELECTION BY HARDWARE OR SOFTWARE ................................................ 6
I2C CONTROL AND STATUS REGISTERS .............................................................................. 7
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
ACCESS INTERFACE .............................................................................................................. 13
8.1
8.2
8.3
8.4
ORDERING INFORMATION..................................................................................................... 14
HOW TO READ THE TOP MARKING...................................................................................... 14
PACKAGE DRAWING AND DIMENSIONS.............................................................................. 15
STEPLESS CLOCK FOR INTEL BROOKDALE CHIPSET
Crystal I/O.................................................................................................................................3
CPU, 3V66, and PCI Clock Outputs........................................................................................3
I
Fixed Frequency Outputs.........................................................................................................4
Power Pins................................................................................................................................5
Register 0: Frequency Select Register (default = 0) ...............................................................7
Register 1: CPU Clock Register (1 = enable, 0 = Stopped) ...................................................7
Register 2: PCI Clock Register (1 = enable, 0 = Stopped) .....................................................7
Register 3: PCI, 48MHz Clock Register (1 = enable, 0 = Stopped) .......................................8
Register 4: 3V66 Control Register (1 = enable, 0 = Stopped) ................................................8
Register 5: Watchdog Control Register...................................................................................8
Register 6: Watchdog Timer Register .....................................................................................9
Register 7: M/N Program Register ..........................................................................................9
Register 8: M/N Program Register ..........................................................................................9
Register 9: Spread Spectrum Programming Register ..........................................................10
Register 10: Divisor and Step-less Enable and Skew Control Register...............................10
Register 11: Winbond Chip ID Register (Read Only).........................................................11
Register 12: Winbond Chip ID Register (Read Only).........................................................11
Register 13: Reserved ...........................................................................................................11
Register 14: CPU to PCI Skew Control .................................................................................12
Register 15: SEL24_48 and SEL48_66 Control ...................................................................12
Block Write protocol ...............................................................................................................13
Block Read protocol ...............................................................................................................13
Byte Write protocol .................................................................................................................13
Byte Read protocol.................................................................................................................13
2
C Control Interface .................................................................................................................4
W83194BR-323/W83194BG-323
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