SATEL-TR489
Integration Guide, Version 0.9
25
4.8
VCC pins
VCC pins are to feed operating voltage to the module. Limit for this voltage is mentioned in
chapter 2.2 DC electrical specifications. User must take into consideration surge current and
current consumption issues before using these pins. Also the user must be aware for any voltage
drop on the feeding path.
4.9
UART pins
Pins 7, 8, 9, 10 are used for UART serial transmission between the module and the terminal. The
UART signal level corresponds to the level in VCC_IO pin. VCC_IO pin must be fed with a correct
voltage level to match the terminal device.
4.10
GPIO pins
See separate document:
https://www.satel.com/wp-content/uploads/2021/10/TIL-0026_SATEL-Radio-Modules_GPIO-
Interface.pdf
Unused pins should be left unconnected.
