Maxim Integrated
Page 9 of 42
Button Functionality
Table 1 describes the functionality of the two buttons.
Table 1. Button Functionality
Button
Short Press
Long Press (3s)
Extra Long
Press (15s)
Power Button
Turn off/on status LED; to
power on, press for 1s
To power off, press and hold the
power button on the
MAXREFDES103# until the LED
status turns magenta and blinks fast
Power off
Button F
Start/stop data collection
(flash logging)
N/A
N/A
Color Definitions for LED Status
Table 2 describes the state of the device for a given color and blinking status.
Table 2. Color Definitions for LED Status
LED Color
Solid (No Blinking)
Fast Blink
Slow Blink
Red
Failure detected – needs
system reset
Communications with the
MAX32664 failed
Battery critically low
(<10%)
Green
USB connected (no data
streaming)
Streaming USB data
Device is ready (no USB
connection)
Blue
Reserved
Streaming Bluetooth LE data
Bluetooth Low Energy
(Bluetooth LE or BLE)
connected (no data
streaming)
Magenta
Reserved
To power off, press and hold
the power button on the
MAXREFDES103# until the
LED status turns magenta and
blinks fast
Reserved
Cyan
Reserved
Flash logging active
5 blinks indicate that
flash logging is complete
Yellow
System is initializing
After the MAX32664
programming is complete, the
LED status flashes yellow for 2s
Battery low (10% to
25%)
White
Reserved
Reserved
MSD mode
Off
LEDs have been turned off N/A
N/A
