Micro controller unit (MCU) with RTC

Details Micro controller unit (MCU) with RTC Micro controller unit (MCU) with RTC

2011-06-14

2011-06-14

Wang, Albert (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C327S291000

Reexamination Certificate

active

07962773

ABSTRACT:
A microcontroller unit (MCU) is disclosed with a stand-alone Real Time Clock (RTC). The MCU includes a processing circuit for receiving digital information and processing said received digital information. A primary clock circuit provides the timing for the processing circuit. A power control circuit controls the power to the processing circuit and the primary clock circuit to control the operation thereof to operate in at least a full power mode drawing a full power level from a supply voltage input and a reduced power mode drawing less than the full power level from the supply voltage input. A stand-alone RTC circuit is also provided, the stand-alone RTC circuit including an RTC clock circuit operating independent of the primary clock circuit. A timer clocked by the RTC clock circuit is operable to increment a stored time value for output therefrom, the RTC clock circuit having a defined time base. An input/output (I/O) device provides access by the processing circuit to the results output by the timer. A power management circuitry manages the power to the stand-alone RTC circuit, such that the RTC clock circuit, the timer, and the I/O device operate regardless of the power mode of operation of the processing circuitry and the primary clock circuit.

REFERENCES:
patent: 6021501 (2000-02-01), Shay
patent: 6067627 (2000-05-01), Reents
patent: 6194940 (2001-02-01), Hunter et al.
National Semiconductor, DP8573A Real Time Clock (RTC), May 1993.
National Semiconductor, NS486SXF Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems, Feb. 1997.

Affiliated with

Also associated with

Rating

Micro controller unit (MCU) with RTC does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Micro controller unit (MCU) with RTC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micro controller unit (MCU) with RTC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2625385