RC11xx(HP)-TM
RC25xx(HP)-TM
RC17xx(HP)-TM
2016 Radiocrafts AS
RC11xx(HP)/25xx(HP)/17xx(HP)-TM Data Sheet rev. 1.48 Page 81 of 86
2016 Tiny Mesh AS
Radiocrafts
Embedded Wireless Solutions
Typical Application Circuit
Typical application designs using Tinymesh modules may or may not have an external MCU. The
embedded Tinymesh application firmware will in most cases handle all desired I/O functions without
needing the support of an external MCU. Recommended circuit design for implementation of RESET,
CONFIG and UART signals depends on whether the application will use an external MCU or not.
Typical Tinymesh module application diagram for RC11xx(HP)-TM, 2500(HP)-TM and RC17xx(HP)-TM
modules.
Notes:
•
VCC_PA is only applicable for RC17xxHP-TM
•
The 2k7/ 1nF Reset RC filter in dotted outline is mandatory for RC11xx(HP)-TM modules, and
not applicable for RC17xx(HP)-TM modules.
When deploying RC17xx(HP) modules in circuits designed to cover all module versions, the
2k7 resistor should be replaced by a zero ohm resistor, and the 1nF capacitor should not be
mounted.
•
R1 is mandatory in noisy surroundings unless RESET is driven by a push-pull output. If a lower
value resistor than 5k6 is used, an external programmer used for firmware upgrade may not be
able to pull the RESET input fully low.
•
R2 is mandatory in noisy environments unless RXD is driven by a push-pull output
•
R3 is a zero ohm resistor, and should be removed when using the programming interface for
device re-flash, if the RESET signal is driven by a push-pull output e.g. an MCU or a
supervisory circuit.
•
The two indicator LEDs ‘Connect /RX’ and ‘RSSI/TX’ are highly recommended as aids for
verification of proper function during installation, test and development stages.
•
S1 is a push button switch for activating Configuration Mode in applications designed for local
configuration over the serial port, with no MCU
•
It is recommended to include a 2x5 pins programming connector to the module programming
pins, to enable future firmware updates. The connector should be a 1.27 mm pitch pin-row
(same pitch in both directions), SMD or through-hole version.
•
For recommended connection of CONFIG, RESET and UART pins, please see table below
Application Circuit
No MCU, No Serial Port
No MCU, with Serial Port
MCU with serial port