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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10pcs free shipping CD4532BE HEF/HCF4532 CD4532BM IC genuine original logic
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Product Category CMOS / SERIE SMD
This will give a 3 bit address related to the calling source, these 3 lines would go to 3 input pins on the MCU, so that you can determine which intr source needs servicing. Also there is a common intr output pin, to drive the MCU’s intr pin. Papabravo Well-Known Member Feb 28, On the it is called EO and it is pin 15 You can also look for a 74xx or a 74xx These are also priority encoder circuits. They have an output whenever one of the inputs is active. I believe that it even has the same pinout as the I think it should do what OP wants, he didn’t say how many ext interrupts he had in mind.
What does the 3 bit address related to the calling source do I am ehf confused. You cannot service all 8 interrupting sources at the same time.
So a decision has to made which ext source has intr priority. If you ‘Or’d the 8 to generate the intr, how would you know which source was requesting the intr???
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.
A PIC prog reads these 3 input port bits, so it knows which ext intr to service. This is what the priority encoder does, it encodes a 3 bit pattern, which unique for each external source.
Semiconductor: HEF4532BP (HEF 4532 BP) – IC PLASTIC CAN 16 PIN
Input source 0 has lowest priority and source 7 has the highest. Have you read the datasheets on priority encoder devices?
Hi Eric, I will answer your question: No And continue your, well explained, story 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.