AN113
Rev 1.0 | Page 17 / 34
www.cmostek.com
3. CMT2150A-EM
The CMT2150A-EM is the Tx module with a CMT2150A device, 6 push buttons, battery case and a couple of necessary
external components. The EM-Connector on the back side of the module allows the connection to the USB Programmer. The
main components are listed below:
Figure 19. Top View of CMT2150A-EM
1.
EM-Connector
–The EM-Connector is 10-pin, 2.54 mm male connector used to connect to the USB Programmer.
2.
Power Mode Switch
–The power mode Switch (S1) is used to select the power supply source of the module. The
module can be supplied by the battery (S1 switched to the VBAT side) or the EM-Connector (S1 switched to the VEXT
side). It is recommended to put the switch to the VEXT side when programming the CMT2150A-EM with the USB
Programmer.
3.
Push Buttons
– 6 push buttons are connected to K[6:1] pins of the device. With different configurations, the push
buttons with have different behavior.
Figure 20. Push Buttons on the CMT2150A-EM
