IN100-D1-R-RC1F datasheet(21/49 Pages) ETC

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N1EDOC-DS-IN100-EN-V1.3

4. Sub-system Description

4.1. UART

A UART interface is provided as the additional control or debugging interface. See chapter 2.1.

External devices may access the device’s internal registers, memory, and eFuse memory through

a UART interface. The interface supports byte-sequence commands. The NanoBeacon Config PC

GUI uses the UART interface to communicate with the device, and other controllers can also

access the device internal information through the UART interface.

4.1.1. UART speed detection

The UART block can automatically detect the speed of the external UART command, as its default

baud rate is 115,200Hz when using the 26MHz external crystal. If the external device needs a

different baud rate, and the UART auto detection feature is enabled, the external device can send

in multiple commands at the new rate. The internal logic will automatically detect the new rate

and reply with an ACK command to the external device when the detection is successful.

It is recommended to use the sequence of operations shown in Figure 6 to achieve stable UART

communication after initial device power-up (cold/warm boot) or UART sleep change.

IN100-D1-R-RC1F Datasheet(PDF) 21 Page - List of Unclassifed Manufacturers