hef bp, ic plastic can 16 pin. Order Code: HEF BP. Packing unit: 1. Net price per pack: EUR. Including VAT 23%: EUR. HEFBDB: HEFB MSI; 8-input Priority Encoder HEF BDB · HEFBDF: HEFB MSI; 8-input Priority Encoder HEF BDF · HEFBF. The IC04 LOCMOS HEB Logic Family Specifications HEF, HEC The IC04 LOCMOS HEB Details, datasheet, quote on part number: HEFB.
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If you ‘Or’d the 8 to generate the intr, how would you know which source was requesting the intr??? Hi Eric, I will answer your question: Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.
HEF 4532 BT
Replacement Transformer Started by ncag Today at 7: Also there is a common intr output pin, to drive the MCU’s intr pin.
Papabravo Well-Known Member Feb 28, You must log in or register to reply here. I think it should do what OP wants, he didn’t say how many ext interrupts he had in mind. Input source 4352 has lowest priority and source 7 has the highest. Can anyone show me schemmatic for this. Articles Top Articles Search resources.
Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at You cannot service all 8 interrupting sources at the same time. How to convert external Interrrupt to Multiple Interrupts. If ‘one of the eight’ ext sources, requesting an intr, generated a 3 bit code which is unique for that source, then the PIC prog would know which Interrupt subr in your prog to execute.
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Forums New posts Search forums. So a decision has to made which ext source has intr priority. I believe that it 453 has the same pinout as the Media New media New comments Search media. Hi, As you will want to know which is the interrupting source, you could use a HEF 8 input priority encoder.
How to convert external Interrrupt to Multiple Interrupts
Depending on the value on these three pins 0 to 7 you will know which interrupt line, on the “priority encoder circuit”, you have to service. Click here to register now. Welcome to our site! What does the 3 bit address related to the calling source do I am totally confused. They have an output whenever one of the inputs is active.
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This is what the priority encoder does, it encodes a 3 bit pattern, which unique for each external source. A PIC prog reads these 3 input port bits, so it knows which ext intr to service. No And continue your, well explained, story Datasheets, Manuals or Parts.