ICS94215 datasheet(8/18 Pages) ICST

Part #	ICS94215

Description	Programmable System Clock Chip for AMD - K7??Processor

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8

ICS94215

0442C—07/03/02

Byte 7: Vendor ID and Revision ID Register

Byte 8: Byte Count and Read Back Register

Notes:

1. PWD = Power on Default

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Byte 11: VCO Frequency Control Register

Note: The decimal representation of these 7 bits (Byte 11

[6:0]) + 2 is equal to the REF divider value .

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Byte 12: VCO Frequency Control Register

Note: The decimal representation of these 9 bits (Byte

12 bit [7:0] & Byte 11 bit [7] ) + 8 is equal to the VCO

divider value. For example if VCO divider value of 36

is desired, user need to program 36 - 8 = 28, namely, 0,

00011100 into byte 12 bit & byte 11 bit 7.

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Byte 9: Watchdog Timer Count Register

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Note: FS values in bit [0:4] will correspond to Byte 0 FS

values. Default safe frequency is same as 00000

entry in byte0.

Byte 10: VCO Control Selection Bit

&

Watchdog Timer Control Register

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