1. Title Block/Version Information:

️· Part Number: ICS950201
️· Date: August 31, 04 (2004)
️· Document Number: 0460G

2. Power Groups (Analog/Digital):

This section lists the power supply connections needed for the chip. It’s vital for proper operation.

️· VDDA: Analog Core PLL1. Provides power to the analog circuits and PLL (Phase-Locked Loop).
️· VDDREF: REF, Xtal. Power for the reference crystal oscillator.
️· VDD48: 48MHz, PLL. Power for a PLL operating at 48 MHz.
️· VDDCPU: Power for the CPU (Central Processing Unit) interface.
️· VDDPCI: Power for the PCI (Peripheral Component Interconnect) interface.
️· VDD3V66: 3.66V power supply.

3. Truth Table:

This table is the core of the datasheet, defining the output frequencies and clock sources based on the state of the "FS" (Frequency Select) pins (FS0, FS1, FS2).

️· FS2, FS1, FS0: These are input pins used to select the desired output clock frequencies.
️· CPU (MHz): Clock frequency for the CPU.
️· 3V66 (5:0) (MHz): Clock frequency for a 3.66V component (likely related to a memory or other peripheral).
️· PCI_F (MHz): Frequency for the PCI interface.
️· REF0 (MHz): Frequency for a reference clock output.
️· USB/DOT (MHz): Frequency for a USB (Universal Serial Bus) or DOT (Digital Output Transmission) interface.

Example Row Interpretation:

️· Row 000 (FS2=0, FS1=0, FS0=0): CPU clock = 66.66 MHz, 3V66 = 66.66 MHz, PCI = 33.33 MHz, REF0 = 813.41 MHz, USB/DOT = 0.084 MHz.

4. Maximum Allowed Current:

This section specifies the maximum current consumption of the chip under different operating conditions.

5. Host Swing Select Functions:

This details how the output voltage swing can be configured, likely to match the requirements of the connected device.
️· BoardTarget: indicates the target impedance of the board trace.
️· ReferenceR: is the reference resistance.
️· Iref: is the reference current.
️· Voh@Z: is the high voltage level at the specified output impedance.

General Notes & Interpretation Challenges:

️· Abbreviations: The datasheet is full of abbreviations that would be more understandable in the context of a specific application.
️· Obsolete Technology: The chip supports older interfaces (PCI, USB) and clock frequencies. It's a legacy device.
️· Documentation Style: Datasheets from that era (2004) were often less verbose and assumed a higher level of technical knowledge.
️· Image Quality: The formatting (table columns, fonts) is constrained by the original scan quality and makes it hard to decipher completely.