CY8C5247PVI-068芯片解密

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　　debug on chip mode. It can be used to generate periodic inter-
　　upts for timing purposes or to wake the system from a low power
　　mode. Firmware can reset the central timewheel.
　　The central timewheel can be programmed to wake the system
　　periodically and optionally issue an interrupt. This enables
　　lexible, periodic wakeups from low power modes or coarse
　　iming applications. Systems that require accurate timing should
　　use the Real Time Clock capability instead of the central
　　imewheel.
　　The 100 kHz clock (CLK100K) works as a low power system
　　clock to run the CPU. It can also generate time intervals such as
　　ast sleep intervals using the fast timewheel.
　　The fast timewheel is a 100 kHz, 5-bit counter clocked by the ILO
　　hat can also be used to wake the system. The fast timewheel
　　settings are programmable, and the counter automatically resets
　　when the terminal count is reached. This enables flexible,
　　periodic wakeups of the CPU at a higher rate than is allowed
　　using the central timewheel. The fast timewheel can generate an
　　optional interrupt each time the terminal count is reached.
　　The 33 kHz clock (CLK33K) comes from a divide-by-3 operation
　　on CLK100K. This output can be used as a reduced accuracy
　　version of the 32.768 kHz ECO clock with no need for a crystal.