JAJSTH2B July 2006 – March 2024 SN65MLVD047A
PRODUCTION DATA
Multidrop configuration is similar to multipoint configuration, but only one driver is present on the bus. A multidrop system can be configured with the driver at one end of the bus, or in the middle of the bus. When a driver is located at one end, a single termination resistor is located at the far end, close to the last receiver on the bus. Alternatively, the driver can be located in the middle of the bus, to reduce the maximum flight time. With a centrally located driver, termination resistors are located at each end of the bus. In both cases, the termination resistor value should be matched to the loaded bus impedance. Figure 8-2 shows examples of both cases.