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M38049FFHKP Datasheet(PDF) 145 Page - Renesas Technology Corp

Part # M38049FFHKP
Description  8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  387 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38049FFHKP Datasheet(HTML) 145 Page - Renesas Technology Corp

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APPLICATION
2.2 Interrupt
Rev.1.00 Jan 14, 2005
REJ09B0212-0100Z
3804 Group (Spec.H)
Clear the interrupt request bit to “0” (no interrupt issued)
↓
NOP (one or more instructions)
↓
Execute the BBC or BBS instruction
Fig. 2.2.15 Sequence of check of interrupt request bit
s Reason
If the BBC or BBS instruction is executed immediately after an interrupt request bit of an interrupt
request register is cleared to “0”, the value of the interrupt request bit before being cleared to “0”
is read.
(2)
Check of interrupt request bit
q When executing the BBC or BBS instruction to an interrupt request bit of an interrupt request
register immediately after this bit is set to “0”, execute one or more instructions before executing
the BBC or BBS instruction.



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