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UPD17062 データシート(PDF) 89 Page - Renesas Technology Corp |
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UPD17062 データシート(HTML) 89 Page - Renesas Technology Corp |
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89 / 298 page  87 µPD17062 9.26 SHIFT CLOCK FREQUENCY SETTING (39H) 9.27 IRQNC (3FH) IRQNC is an interrupt request flag that indicates the interrupt request state. When an interrupt request is generated, the flag is set to 1. When the request is accepted (interrupt is made), the flag is reset to 0. The interrupt request flag can be read and written by the program. Hence, if 1 is written, an interrupt by software can be generated. If 0 is written, the interrupt hold status can be released. The IRQNC flag becomes 0 upon reset. b3 b2 b1 b0 SIO0CK3 SIO0CK2 SIO0CK0 39H SIO0CK1 00 01 10 11 100 kHz 200 kHz 500 kHz 1 MHz Fixed at 0 Internal clock frequency Flag name Bit position Interrupt source IRQNC b0 INTNC pin IRQBTM0 b1 Clock timer IRQVSYN b2 VSYNC pin IRQSIO0 b3 Serial interface |
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