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UPD17015GS Datasheet(PDF) 80 Page - NEC

Part # UPD17015GS
Description  4-BIT SINGLE-CHIP MICROCONTROLLER FOR PORTABLE RADIOS
PDF  120 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17015GS Datasheet(HTML) 80 Page - NEC

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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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