MAX17823B datasheet(42/121 Pages) MAXIM

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MAX17823B

12-Channel High-Voltage Data Acquisition System

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Maxim Integrated | 42

UART INTERFACE

The battery-management UART protocol allows up to 32 devices to be connected in daisy-chain fashion as shown

in Figure 24. The host initiates all communication with the daisy-chain devices via a UART interface such as the

MAX17841B. The data flow is always unidirectional from the host, up the daisy-chain (up-stack) and then loops back

down the daisy-chain (down-stack) to the host as shown in Figure 24.

Each device first receives data at its lower RX port and immediately re-transmits data from its upper TX port to the

lower RX port of the next up-stack device. The last device transmits data from its upper TX port directly into its upper

RX port and then immediately re-transmits the data from its lower TX port to the upper RX port of the next down-

stack device. The protocol supports fixed baud rates of 2Mb/s, 1Mb/s, or 0.5Mb/s. The baud rate is set by the host

and is automatically detected by the device.

Figure 24. UART Interface

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