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CHAPTER 11 REALOS-RELATED HARDWARE
■ Save/Restore Processing
If it is necessary to save and restore the internal state of the bit search module, such as when the
bit search module is used in an interrupt handler, use the following procedure:
1. Read the 1 detection data register and save its contents (save).
2. Use the bit search module.
3. Write the data saved in "1." to the 1 detection data register (restore).
With the above operation, the value obtained when the detection result register is read the next
time corresponds to the value written to the bit search module before "1.".
If the data register written to last is the 0 detection or change point detection register, the value is
restored correctly with the above procedure.
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