Okay, here's a summary of the key information gleaned from the provided text. I'm organizing it into categories for clarity.

1. Overview: MPC8377E PowerQUICC II Pro Processor

️· This document details the electrical characteristics and specifications for the MPC8377E PowerQUICC II Pro Processor.
️· It highlights power supply requirements, output driver capabilities, and power sequencing guidelines.

2. Operating Conditions & Power Supplies

️· Core Voltage (VDD/AVDD):
- Up to 667 MHz: 1.0V ± 50mV
- 800 MHz: 1.05V ± 50mV
- Must track each other in the positive or negative direction.
️· DRAM I/O Voltage (GVDD):
- DDR1: 2.5V ± 125mV or 1.8V ± 90mV
️· Ethernet Voltage (LVDD):
- 3.3V ± 165mV or 2.5 V ± 125mV
️· Other Voltages (OVDD, etc.): See table for specific values.
️· Power Sequencing:
- Core voltages (VDD and AVDD) must reach 90% of their nominal value *before* I/O voltages (GV DD, LV DD, and OV DD) reach 10% of their value. PORESET should be asserted before full power-up.

3. Output Driver Characteristics

️· Driver strength (output impedance) varies depending on the signal and supply voltage. Examples include:
- Local bus: 45Ω (LBVDD = 2.5V or 3.3V) or 40Ω (LBVDD = 1.8V)
- PCI signals: 25Ω (OVDD = 3.3V)
- DDR signals: 18Ω (depending on voltage)
- Ethernet signals: 45Ω (LVDD = 2.5V or 3.3V)
- GPIO signals: 45Ω (OVDD = 3.3V)

4. Important Notes & Cautions

️· Overshoot/Undershoot: Input voltages have limits on overshoot and undershoot.
️· PCI Compliance: While the processor has some output voltage protection, there may be some difficulty fully complying with some PCI specification ratings.
️· Power-Up: Proper power sequencing is critical to avoid contention and current draw.



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