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7643 Datasheet(PDF) 128 Page - Renesas Technology Corp |
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7643 Datasheet(HTML) 128 Page - Renesas Technology Corp |
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128 / 424 page  Rev.2.00 Aug 28, 2006 page 7 of 202 7643 Group REJ09B0133-0200 APPLICATION 2.1 I/O Port 2.1.3 Key-on wake-up interrupt application example Outline : Key-on wake-up is realized, using internal pull-up resistors. Specifications: System is returned from the wait mode when the key-on wakeup interrupt occurs by input of the falling edge to port P2i. Figure 2.1.10 shows the registers setting; Figure 2.1.11 shows a connection diagram; Figure 2.1.12 shows the control procedure. ICONC b0 b7 P2D b0 b7 0 0 0 0 1 Interrupt control register C (address 0716) Port P2 direction register (address 0D16) Input mode Key input interrupt: Enabled IREQC b0 b7 Interrupt request register C (address 0416) Key input interrupt request bit 0 PUP2 b0 b7 1 1 1 1 Port P2 pull-up control register (address 1216) Port P20 to P24 pull-up enabled 1 PTC b0 b7 Port control register (address 1016) VIHL level 0 0 0 0 0 Fig. 2.1.10 Registers setting |
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