GEM Module Hardware Integration Guide
Version 0.3
Wahoo Fitness
10
90 West Wieuca Road, Suite 110
Atlanta, GA 30342
www.wahoofitness.com
1-‐877-‐978-‐1112
Example for Serial Wire Debug Interface
UART Host
The UART is required for communicating between the GEM module and fitness machine
console using the CSAFE protocol. Pins 15 and 16 of the module have been configured as the
UART interface. Pin 15 is the UART TX line and pin 16 is the UART RX line.
Reset
The GEM module can be reset by holding PIN 22 low for 0.5us. The following is an example
reset circuit:
Example Reset Circuit
