FUJITSU MB91460 SERIES FR60 - Manual (Page 411)

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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.