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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M16C/5M датащи(PDF) 29 Page - Renesas Technology Corp |
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M16C/5M датащи(HTML) 29 Page - Renesas Technology Corp |
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29 / 159 page  REJ03B0267-0101 Rev.1.01 Page 29 of 156 Jul 23, 2010 M16C/5M Group, M16C/57 Group 2. Central Processing Unit (CPU) 2.8.7 Interrupt Enable Flag (I Flag) The I flag enables maskable interrupts. Maskable interrupts are disabled when the I flag is 0, and enabled when it is 1. The I flag becomes 0 when an interrupt request is accepted. 2.8.8 Stack Pointer Select Flag (U Flag) ISP is selected when the U flag is 0. USP is selected when the U flag is 1. The U flag becomes 0 when a hardware interrupt request is accepted, or the INT instruction of software interrupt number 0 to 31 is executed. 2.8.9 Processor Interrupt Priority Level (IPL) IPL is 3 bits wide and assigns processor interrupt priority levels from 0 to 7. If a requested interrupt has higher priority than IPL, the interrupt request is enabled. 2.8.10 Reserved Areas Only set these bits to 0. The read value is undefined. |
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