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

• Manufacturer Part Number: w83194br-sd
• Description: Winbond Clock Generator For Intel P4 Springdale Series Chipset
• Manufacturer: Winbond Electronics Corp America

Table of Contents-
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2.
3.
4.
5.
6.
7.
GENERAL DESCRIPTION ......................................................................................................... 1
FEATURES ................................................................................................................................. 1
PIN CONFIGURATION ............................................................................................................... 2
BLOCK DIAGRAM ...................................................................................................................... 2
PIN DESCRIPTION..................................................................................................................... 3
FREQUENCY SELECTION BY HARDWARE OR SOFTWARE ................................................ 6
I
5.1
5.2
5.3
5.4
5.5
5.6
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
2
C CONTROL AND STATUS REGISTERS............................................................................... 7
CLOCK GEN. FOR INTEL P4 SPRINGDALE/PRESCOTT SERIES CHIPSET
Crystal I/O ....................................................................................................................... 3
CPU, SRC, 3V66, PCI Clock Outputs ............................................................................ 3
Fixed Frequency Outputs ............................................................................................... 4
I2C Control Interface....................................................................................................... 4
Output Control Pins ........................................................................................................ 5
Power an GND Pins........................................................................................................ 5
Register 0: Frequency Select (Default =10H)................................................................. 7
Register 1: SRC/CPU Clock (1 = Enable, 0 = Disable) (Default = E3H) ........................ 7
Register 2: PCI Clock (1 = Enable, 0 = Disable) (Default = FFH) .................................. 8
Register 3: PCI, 3V66 Clock (1 = Enable, 0 = Disable) (Default = EFH)........................ 8
Register 4: 24_48 MHz, REF Control (1 = Enable, 0 = Disable) (Default =FCH)........... 8
Register 5: Watchdog Control (Default = 00H) ............................................................... 9
Register 6: Watchdog Timer (Default =08H) ................................................................ 10
Register 7: Asynchronous Program (Default = 40H) .................................................... 10
Register 8: M/N Program (Default = 8AH) .................................................................... 10
Register 9: M/N Program (Default = CEH) ................................................................... 11
Register 10: M/N Program (Default = 13H) .................................................................. 11
Register 11: Spread Spectrum Programming (Default = 2FH)..................................... 11
Register 12: Divider Ratio (Default = C6H)................................................................... 12
Register 13: Control (Default = 0FH) ............................................................................ 12
Register 14: Control (Default = 27H) ............................................................................ 13
Register 15: Control (Default =3CH)............................................................................. 13
Register 16: Control (Default = 24H) ............................................................................ 13
Register 17: Slew Rate Control (Default = 00H)........................................................... 14
Register 18: Slew Rate Control (Default = 00H)........................................................... 14
Register 19: Control (Default = 0AH)............................................................................ 15
Register 20: Winbond Chip ID – Project Code (Ready Only) (Default = 47H) ............. 15
W83194BR-SD/W83194BG-SD
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