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M93C46-W Scheda tecnica(PDF) 9 Page - STMicroelectronics |
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M93C46-W Scheda tecnica(HTML) 9 Page - STMicroelectronics |
9 / 38 page M93C86, M93C76, M93C66, M93C56, M93C46 Connecting to the serial bus 9/38 2 Connecting to the serial bus Figure 3. Bus master and memory devices on the serial bus Figure 3 shows an example of three memory devices connected to an MCU, on a serial bus. Only one device is selected at a time, so only one device drives the Serial Data Output (Q) line at a time, the other devices are high impedance. The pull-down resistor R (represented in Figure 3) ensures that no device is selected if the Bus Master leaves the S line in the high impedance state. AI14377 Bus master M93xxx memory device SDO SDI SCK CQD S M93xxx memory device CQD S M93xxx memory device CQD S CS3 CS2 CS1 ORG ORG ORG RR R VCC VCC VCC VCC VSS VSS VSS VSS |
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