• In case the transparent mode or the feature of switching off the UART in command
mode shall be used, connect the shared pin
pin to the host
controller.
7. (Optional) Status indication
Connect the
pin to the host controller to allow easy indication of the status.
8. (Optional) Flash and debug interface
In case of custom firmware development, it is recommended to additionally have the
pins
and
accessible in order to support a fail-safe update of firmware.
A standard socket on the customer’s PCB for connecting a flash adapter can be use-
ful for debugging purposes (e.g. a JTAG 2*10 pin header with 2.54 mm pin-to-pin
distance).
If the module has to be connected to a PC, a converter (TTL to RS-232 or TTL to USB)
has to be used. See chapter
for details on all pins. Please refer to the Proteus-e
evaluation board schemes for a reference design
The logic level of the module is based on 3V. A 5V logic level must not be
connected directly to the module.
Proteus-e reference manual version 0.3
© November 2021
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