M16C User Manual.pdf

Key-Input InterruptMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERInterrupt control register (Note 2) b7 b6 b5 b4 b3 b2 b1 b0Symbol Address When resetKUPIC 004D16 XXXX00002Bit symbolILVL0ILVL1ILVL2Bit nameInterrupt priority levelselect bitFunctionb2 b1 b00 0 0 : Level 0 (interrupt disabled)0 0 1 : Level 10 1 0 : Level 20 1 1 : Level 31 0 0 : Level 41 0 1 : Level 51 1 0 : Level 61 1 1 : Level 7RWIRInterrupt request bit0 : Interrupt not requested1 : Interrupt requested(Note1)Port P10 direction registerNothing is assigned.These bits can neither be set nor reset. When read, their contents areindeterminate.Note 1: This bit can only be accessed for reset (= 0), but cannot be accessed for set (= 1).Note 2: To rewrite the interrupt control register, do so at a point that dose not generate theinterrupt request for that register. For details, see the precautions for interrupts.b7 b6 b5 b4 b3 b2 b1 b0Symbol Address When resetPD10 03F616 0016Bit symbolPD10_0PD10_1PD10_2PD10_3PD10_4PD10_5PD10_6Bit symbolPort P100 direction registerPort P101 direction registerPort P102 direction registerPort P103 direction registerPort P104 direction registerPort P105 direction registerPort P106 direction registerBit symbol0 : Imput mode(Functions as an input port)1 : Output mode(Functions as an output port)RWPD10_7Port P107 direction registerPull-up control register 2b7 b6 b5 b4 b3 b2 b1 b0Symbol Address When resetPUR2 03FE16 0016Bit symbolPU20PU21PU22PU23PU24PU25Bit nameP80 to P83 pull-upP84 to P87 pull-up(Except P85)P90 to P93 pull-upP94 to P97 pull-upP100 to P103 pull-upP104 to P107 pull-upFunctionThe corresponding port is pulledhigh with a pull-up resistor0 : Not pulled high1 : Pulled highNothing is assigned.In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.R W Figure 2.13.2. key-input interrupt-related registers435