h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 89

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

2.9
2.9.1
Instructions BSET, BCLR, BNOT, BST, and BIST read data in byte units, and write data in byte
units after bit operation. Therefore, attention must be paid when these instructions are used for
ports or registers including write-only bits.
Instruction BCLR can be used to clear the flag in the internal I/O register to 0. If it is obvious that
the flag has been set to 1 by the interrupt processing routine, it is unnecessary to read the flag
beforehand.
Usage Note
Notes on Using the Bit Operation Instruction
Rev. 2.00 Dec. 05, 2005 Page 51 of 724
REJ09B0200-0200
Section 2 CPU