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UPD17015 Datasheet(PDF) 82 Page - Renesas Technology Corp |
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UPD17015 Datasheet(HTML) 82 Page - Renesas Technology Corp |
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82 / 122 page  80 µPD17015 14.2.4 Halt Release by Key Input Halt release by key input is set by “HALT 0001B” instruction. When the halt release by key input is set, the halt state is released when high level is input at any one of the 0B port lines (P0B2 to P0B0 pins) Each 0B port pin has a built-in pull-down resistor. (1) When general-purpose output port is made key source P0B2 P0B1 P0B0 General-purpose output port Latch Switch A Execute a “HALT 0001B” instruction after the key source signal general-purpose output port is made high level. Note that if an alternate switch like switch A in the figure above is used, while switch A is closed, high level is applied to the P0B0 pin and the halt state is immediately released. (2) When halt released by other microcomputer, etc. P0B2 P0B1 P0B0 General-purpose output port Latch Output port Microcomputer, etc. Halt can be released by another microcomputer, etc. as shown in the figure above. |
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