5. CONCLUSION
The Bobcat x86 microprocessor is designed in TSMC 40nm
BULK CMOS process and uses a new core C6 (CC6) deep-sleep
power state to reduce leakage during periods of inactivity. Each
Bobcat core CC6 state uses a control sequence that saves or
restores the x86 architectural state while handling interrupts,
flushing caches, and detecting MCA errors. The core sleep
transistors use 4 uniquely sized integrated PFET headers that are
driven by a 4-bit CC6SleepEn PG bus. Measured results show a
92% reduction of VDD leakage at the cost of 1-3% die area and
minimal disturbance to power supply and electrical
characterizations of the system with a wake and state restore time
of 31µ s.