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• System Control Module
The system control module (SCM) is also connected to the peripheral bus. It contains five blocks used for
general system functions:
A real-time clock (RTC) clocked from an independent 32.768 kHz oscillator
An operating system timer (OST) for general system timer functions as well as a watchdog mode
Twenty-eight general-purpose I/Os (GPIO)
An interrupt controller
A power-management controller that handles the transitions in and out of sleep and idle modes
A reset controller that handles the various reset sources on the processor
SA-1110 Block Diagram
9
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