US38024-BAG1 Renesas Electronics America, US38024-BAG1 Datasheet - Page 124
US38024-BAG1
Manufacturer Part Number
US38024-BAG1
Description
DEV EVALUATION KIT H8/38024
Manufacturer
Renesas Electronics America
Series
H8®r
Type
MCUr
Datasheet
1.US38024-BAG1.pdf
(684 pages)
Specifications of US38024-BAG1
Contents
2G (Second-generation) Evaluation Board, HEW debugger support, Cable and CD-ROM
For Use With/related Products
H8/38024
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 124 of 684
- Download datasheet (5Mb)
Section 3 Exception Handling
• Example of a malfunction
Rev. 8.00 Mar. 09, 2010 Page 102 of 658
REJ09B0042-0800
When flags are cleared with multiple instructions, other flags might be cleared during
execution of the instructions, even though they are currently set, and this will cause a
malfunction.
Here is an example in which IRRI0 is cleared and disabled in the process of clearing IRRI1
(bit 1 of IRR1).
MOV.B @IRR1:8,R1L ......... IRRI0 = 0 at this time
AND.B #B'11111101,R1L ..... Here, IRRI0 = 1
MOV.B R1L,@IRR1:8 ......... IRRI0 is cleared to 0
In the above example, it is assumed that an IRQ0 interrupt is generated while the AND.B
instruction is executing.
The IRQ0 interrupt is disabled because, although the original objective is clearing IRRI1,
IRRI0 is also cleared.
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