Fujitsu FR60 Manual

A SERVICE OF

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Chapter 28 Bit Search

8.Caution

8. Caution

The following are the remarks on using the bit search module.

• The macros are for REALOS(OS), and the user cannot use them when using REALOS.

• If the relevant detection is not found, a detection result of 32(decimal), 10(hexadecimal) or 10000(binary) is

returned.

• A value of “0” is not returned for the changing position detection.

• The data registers (0-detection/1-detection/ changing-position-detection) is a write-only, and accessed by

word.

However, the 1-detection read address is assigned to an internal data register for restoration so that you can

restore previous bit search state. (Refer to “7.3 How is a result read? (Page No.394)”.)

• The 0-detection register BS0, 1-detection register BSD1 and changing-position-detection register BSDC are

included in one register in terms of the structure. The operation is selected with the lowest four bits of the

accessing address.