Maxim Integrated
Page 6 of 52
PART NUMBER
APPLICATION ALGORITHM/FIRMWARE
BOOTLOADER
KEY
MAXIM REFERENCE
DESIGN
MAX32664GWEB
The Wearable heart-rate monitoring (WHRM)
algorithm (25Hz sampling). The WHRM algorithm is
configured to use LED1 and Photodiode (PD) 1
or/and 2, and it is compatible with the sensor hub
combination of the MAX32664GWEB, MAX86141
AFE, and KX-122 accelerometer. It is mandatory to
use accelerometer the KX-122 accelerometer or
external accelerometer data with the WHRM
algorithm to detect and compensate motion. If the
KX-122 accelerometer is not connected to
MAX32664, then external accelerometer data
should be supplied at the 25Hz sampling rate.
The Automatic Exposure Control and Skin Control
Detection (AEC-SCD) of WHRM (AEC-SCD is included
in the WHRM algorithm). If AEC-SCD is enabled , the
LED current, pulse width and sample rate are
automatically determined by the algorithm. If AEC-
SCD is not enabled, the LED current, LED current
range, pulse width, and ADC range registers should
be configured by the host software.
B
MAXREFDES101#