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| Why two inputs? |
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| viperidae:
Looking at the datasheet for this bus interface IC, there are two inputs. They're both identical. Why would they do that? https://www.renesas.com/us/en/doc/products/assp/rej03f0095_ha12240fp.pdf S1 and S2 are both TX inputs. |
| vealmike:
--- Quote from: viperidae on February 07, 2019, 07:26:52 am ---Looking at the datasheet for this bus interface IC, there are two inputs. They're both identical. Why would they do that? https://www.renesas.com/us/en/doc/products/assp/rej03f0095_ha12240fp.pdf S1 and S2 are both TX inputs. --- End quote --- Philosophical rather than electrical your question is. The application must you consider. To see a wood, one must first ignore the trees. Change must come from within, but charge a product of time and current it is. Yeerrs. |
| viperidae:
The application for the chip is a physical driver for IEBus, to connect to a NEC/Renesas MCU with a built in IEBus controller. Those built in controllers only have one TX output. |
| Ice-Tea:
S1 and S2 are followed by an OR gate. So it allows some sort of multiplexing or logic gating. If you don't need it, tie it to ground. |
| bsudbrink:
--- Quote from: vealmike on February 07, 2019, 07:45:39 am --- --- Quote from: viperidae on February 07, 2019, 07:26:52 am ---Looking at the datasheet for this bus interface IC, there are two inputs. They're both identical. Why would they do that? https://www.renesas.com/us/en/doc/products/assp/rej03f0095_ha12240fp.pdf S1 and S2 are both TX inputs. --- End quote --- Philosophical rather than electrical your question is. The application must you consider. To see a wood, one must first ignore the trees. Change must come from within, but charge a product of time and current it is. Yeerrs. --- End quote --- Stock in Disney/Lucas Arts he owns. |
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