ICS94228BF IDT, Integrated Device Technology Inc, ICS94228BF Datasheet
ICS94228BF
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ICS94228BF Summary of contents
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Integrated Circuit Systems, Inc. Programmable System Clock Chip for AMD - K7™ processor Recommended Application: VIA KT266 style chipset Output Features: • Differential pair open drain CPU clocks @ 2.5V • Differential pair push-pull CPU clocks ...
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ICS94228 Preliminary Product Preview Pin Descriptions ...
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General Description The ICS94228 is a main clock synthesizer chip for AMD-K7 based systems with VIA style chipset. This provides all clocks required for such a system. The ICS94228 belongs to ICS new generation of programmable system clock generators. It ...
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ICS94228 Preliminary Product Preview 2 General I C serial interface information for the ICS94228 How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D2 • ICS clock will acknowledge • Controller (host) ...
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Brief I Programmable System Frequency Generator Register Name Functionality & Frequency Select Register Output Control Registers Vendor ID & Revision ID Registers Byte Count Read Back Register Watchdog Enable Register Watchdog Control Registers VCO Control Selection Bit VCO Frequency ...
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ICS94228 Preliminary Product Preview Serial Configuration Command Bitmap Byte0: Functionality and Frequency Select Register (default = 0) Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 SSB1 S SB0 FS3 FS2 FS1 FS0 ...
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Byte 1: CPU, Active/Inactive Register (1= enable disable ...
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ICS94228 Preliminary Product Preview Byte 7: Vendor ID2, Active/Inactive Register (1= enable disable ...
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Byte 13: Output Skew Control Register (1= enable disable ...
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ICS94228 Preliminary Product Preview Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5V Logic Inputs ...
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Electrical Characteristics - REF 70º 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage V OH5 Output Low Voltage V OL5 Output High Current I OH5 Output Low Current I OL5 ...
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ICS94228 Preliminary Product Preview Electrical Characteristics - PCICLK 70º 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage V OH1 Output Low Voltage V OL1 Output High Current I OH1 Output ...
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Electrical Characteristics - 24MHz, 48MHz 70º 3.3 V +/-5 DDL PARAMETER SYMBOL Output High Voltage V OH5 Output Low Voltage V OL5 Output High Current I OH5 Output Low Current ...
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ICS94228 Preliminary Product Preview Shared Pin Operation - Input/Output Pins The I/O pins designated by (input/output) on the ICS94228 serve as dual signal functions to the device. During initial power-up, they act as input pins. The logic level (voltage) that ...
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AGP_STOP# Timing Diagram AGP_STOP asychronous input to the clock synthesizer used to turn off the AGP clocks. for low power operation. AGP_STOP# is synchronized by the ICS94228. The AGPCLKs will always be stopped in a low ...
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ICS94228 Preliminary Product Preview PD# Timing Diagram The power down selection is used to put the part into a very low power state without turning off the power to the part. PD asynchronous active low input. This signal ...
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INDEX INDEX AREA AREA 45° 45° SEATING SEATING b PLANE PLANE .10 (.004) C .10 (.004) C 300 ...