12.1 DC Electrical Specification
DC Power Supply Levels
The processor core is powered by a +3.3V (+/- 5%) supply. The processor output drivers are powered from a separate supply, dependent on the output logic family used in the application system:
- For JEDEC-compatible HSTL operation, the nominal value for VccQSC and VccQSys are in the 1.5V (+/- 100 millivolt) range.
- For CMOS/TTL compatible systems, VccQSC and VccQSys can be externally tied to the same Vcc as the core power supply.
NOTE: The I/O pins of the R10000 processor may not be driven higher than 4.0V by any device in the system until the Vcc and VccQ inputs are stable.
Copyright 1996, 1997, MIPS Technologies, Inc. -- 09 DEC 96
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