Maxim Integrated MAX32664 User Manual

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MAX32664 User Guide

UG6806; Rev preliminary 1; 02/22

Abstract

The MAX32664 user guide provides flow charts, timing diagrams, GPIOs/pin usage, I2C interface protocol, and annotated I2C traces between the host microcontroller and the MAX32664. Typical application uses the MAX32664 as a low-power microcontroller in a sensor hub configuration to provide processed data such as heart rate and SpO2.

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Table of Contents

Introduction .......................................................................................................................................... 44

MAX32664 Variants ............................................................................................................................... 55

Maxim Reference Designs with MAX32664 ............................................................................................ 98

MAXREFDES220# ............................................................................................................................... 98

MAXREFDES101# ............................................................................................................................. 109

MAX32664 GPIOs and RSTN Pin ......................................................................................................... 1211

MAX32664 Bootup and Application Mode ......................................................................................... 1312

MAX32664 Bootloader Mode ........................................................................................................ 1312

MAX32664 Application Mode ........................................................................................................ 1312

Communications to the MAX32664 over I2C...................................................................................... 1413

Bit Transfer Process ....................................................................................................................... 1413

I2C Write ....................................................................................................................................... 1716

I2C Read ........................................................................................................................................ 1817

MAX32664 I2C Message Protocol Definition ...................................................................................... 1918

MAX32664 I2C Annotated Application Mode Example ....................................................................... 3831

I2C Commands to Flash the Application Algorithm ............................................................................ 4334

In-Application Programming of the MAX32664 .................................................................................. 4837

MAX32664 APIs and Methods for Reset, Sleep, Status, Heartbeat ..................................................... 5039

Revision History ................................................................................................................................. 5140

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List of Figures

Figure 1. MAX32664 block diagram. ........................................................................................................ 9

Figure 2. MAXREFDES101# block diagram. ............................................................................................. 10

Figure 3. Pin connections between the host and the MAX32664. ........................................................... 12

Figure 4. Entering bootloader mode using the RSTN pin and the MFIO GPIO pin. ................................... 13

Figure 5. Entering application mode using the RSTN pin and MFIO pin................................................... 14

Figure 6. I2C Write/Read data transfer from host microcontroller. ........................................................ 15

Figure 7. Sequence to enter bootloader mode. ...................................................................................... 45

Figure 8. Page number byte 0x44 from the .msbl file. ............................................................................ 45

Figure 9. Initialization vector bytes 0x28 to 0x32 from the .msbl file. ..................................................... 45

Figure 10. Authentication bytes 0x34 to 0x43 from the .msbl file. .......................................................... 45

Figure 11. Send page bytes 0x4C to 0x205B from the .msbl file. ............................................................. 46

Figure 12. Sequence to enter application mode. .................................................................................... 47

Figure 13. MAX32664 in-application programming flowchart. ............................................................... 49

List of Tables

Table 1. MAX32664 Variants, Matching Algorithms, and Reference Designs ............................................ 5

Table 2. RSTN Pin and GPIOs Pins .......................................................................................................... 12

Table 3. Additional GPIOs Used on the MAX32664 for the MAXREFDES220# ......................................... 13

Table 4. Additional GPIOs Used on the MAX32664 for the MAXREFDES101# ......................................... 13

Table 5. Read Status Byte Value ............................................................................................................. 15

Table 6. MAX32664 I2C Message Protocol Definitions ........................................................................... 19

Table 7. Sensor Hub Status Byte ............................................................................................................ 35

Table 8. Output FIFO Format Definitions ................................................................................................ 35

Table 10. MAX32664GWEA I2C Annotated Application Mode Example .................................................. 39

Table 11. MAX32664GWEB I2C Annotated Application Mode Example .................................................. 40

Table 12. MAX32664GWEC I2C Annotated Application Mode Example .................................................. 41

Table 13. MAX32664GWED I2C Annotated Application Mode Example .................................................. 43

Table 14. Annotated I2C Trace for Flashing the Application ................................................................... 45

Table 15. MAX32664 I2C Message Protocol Definitions ......................................................................... 50

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Introduction

The MAX32664 is a pre-programmed microcontroller with firmware drivers and algorithms. Combined with the appropriate sensor devices, the MAX32664 acts as a sensor hub to provide processed data to a host device. This solution seamlessly enables customers to receive raw and/or calculated data from Maxim’s optical sensor solutions, while keeping overall system power consumption in check. The tiny form factor (1.6mm x 1.6mm 16-bump WLP) allows for integration into extremely small applications. The MAX32664 is integrated into Maxim’s complete reference design solutions, which shortens the time to market.

The MAX32664 is the same hardware as the MAX32660 but with a pre-programmed bootloader that accepts in-application programming (IAP) of Maxim supplied algorithms and sensor drivers. The MAX32664 provides a fast-mode, I2C slave interface to a microcontroller host. A second I2C interface is dedicated to communicating with sensors.

For further details on memory, register mapping, system clocks, reset, power management, GPIOs/alternate functions, DMA controller, UART, RTC, timers, WDT, I2C, and SPI, see the MAX32660 User Guide.

For ordering information, mechanical and electrical characteristics, and the pinout for the MAX32664 family of devices, refer to the MAX32664 data sheet.

For information on the Arm® Cortex®-M4 with FPU core, refer to the Cortex-M4 with FPU Technical Reference Manual.

Arm is a registered trademark and registered service mark of Arm Limited.

Cortex is a registered trademark of Arm Limited.

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MAX32664 Variants

The MAX32664 is pre-programmed with bootloader software that accepts in-application programming of Maxim application code which consists of algorithms and the associated sensor driver. The MAX32664 is used as a sensor hub controller.

The algorithm/application code provides processed and/or raw data through the I2C interface. Several variants of the MAX32664 exist based on the target application. These variants come pre-programmed with a bootloader that only accepts the matching encryption keys for the part (e.g., the MAX32664GWEA bootloader is pre-programmed with the A encryption key, reference designs are programmed with Z keying, etc.). Designers should use the table below in order to select the correctly keyed part..

Table 1. MAX32664 Variants, Matching Algorithms, and Reference Designs

PART NUMBER

APPLICATION ALGORITHM/FIRMWARE

BOOTLOADER

KEY

MAXIM REFERENCE

DESIGN

MAX32664GWEA

MaximFast: Maxim Integrated® finger-based heartrate and SpO2 monitoring algorithm (100Hz sampling). The MaximFast algorithm is compatible with the sensor hub combination of the MAX3244664GWEA, MAX30101 AFE, and KX-122 accelerometer. It is recommended, but not mandatory, to use an accelerometer with the MaximFast algorithm. Do not enable the accelerometer if there is no accelerometer in your design. If the KX-122 accelerometer is not installed in the design and external accelerometer data is supplied, then the accelerometer should use the 100Hz sampling rate.

Automatic gain control (AGC) for MaximFast. If the AGC is enabled, the LED currents and pulse width are automatically determined by the algorithm. If the AGC is not enabled, the LED currents and pulse width registers should be configured by the host software.

MAXREFDES220#

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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 AECSCD is not enabled, the LED current, LED current range, pulse width, and ADC range registers should be configured by the host software.

MAXREFDES101#

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PART NUMBER

APPLICATION ALGORITHM/FIRMWARE

BOOTLOADER

KEY

MAXIM REFERENCE

DESIGN

MAX32664GWEC

The Wearable Heart-Rate Monitoring (WHRM) algorithm (25Hz sampling). The WHRM algorithm is configured to use LED1 (Green) and Photodiode 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 the 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 AECSCD is not enabled, the LED current, LED current range, pulse width, and ADC range registers should be configured by the host software.

The Wearable Oxygen Saturation (WSpO2) algorithm (25Hz sampling). The WSpO2 algorithm is configured to use LED2 (IR) and LED3 (Red) and Phot-diode 1 or 2, and it’s compatible with the sensor hub combination of the MAX32664GWEB, MAX86141 AFE, and KX-122 accelerometer. It is mandatory to use an accelerometer with the WSpO2 algorithm to detect motion. If the KX-122 accelerometer is not connected to MAX32664 external accelerometer data should be supplied, then external accelerometer should use the 25Hz sampling rate. The Automatic Gain Control (AGC) of WSpO2. If AGC is enabled, the LED currents and ADC range are automatically determined by the algorithm. If the AGC is not enabled, the LED currents, pulse width and ADC range registers should be configured by the host software.

MAXREFDES101 with SpO2 LED Board

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PART NUMBER

APPLICATION ALGORITHM/FIRMWARE

BOOTLOADER

KEY

MAXIM REFERENCE

DESIGN

MAX32664GWED

The finger-based Blood Pressure Trending (BPT), heart rate and SpO2 monitoring algorithm (100Hz Sampling). The algorithm is compatible with the sensor hub combination of the MAX32664GWED and MAX30101 AFE. No accelerometer is required for this algorithm. The BPT algorithm includes Automatic gain control to adjust LED currents. Prior to running the algorithm, a calibration procedure is required to determine blood pressure and SpO2 calibration coefficients.

Automatic gain control (AGC). If the AGC is enabled, the LED currents and pulse width are automatically determined by the algorithm. If the AGC is not enabled, the LED currents and pulse width registers should be configured by the host software.

MAXREFDES220#

MAX32664GWEZ

Z-keyed algorithm/firmware of the above which may be used to in-application program the Maxim Integrated reference designs listed or for boards that use the MAX32664GWEZ.

MAXREFDES220# MAXREFDES101#

For all the MAX32664 parts, the algorithm (.msbl file) with the corresponding bootloader key must be downloaded, and these parts must be programmed using the in-application programming feature of the bootloader. The MAX32664 is only pre-programmed with the bootloader software.

Maxim Integrated is a trademark of Maxim Integrated Products, Inc.

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Maxim Reference Designs with MAX32664

Maxim provides multiple reference designs to its customers to enable quick and effective adoption of MAX32664 and fastest time to market. For detailed schematics, refer to the user guide of each reference design.

MAXREFDES220#

The MAXREFDES220# reference design provides everything you need to quickly prototype your product to measure finger-based heart rate and blood oxygen saturation level (SpO2).

SENSOR HUB DRIVER FIRMWARE

DIGITAL SIGNAL PROCESSING

ALGORITHMS FOR

HEART RATE AND SPO2

MAX30101

PULSE OXIMETER

AND HEART-RATE

SENSOR

KX122-1037

3-AXIS

ACCELEROMETER

MAXREFDES220

FINGER HEART RATE AND PULSE OXIMETER SMART SENSOR

MAX32630FTHR

(HOST)

SENSOR

PLATFORM

COMMANDS

SECURE FIRMWARE BOOTLOADER

MAX32664(A)

BIOMETRIC SENSOR HUB

HEART RATE DATA

SPO2 DATA

ENCRYPTED .MSBL

APPLICATION

ALGORITHM/FIRMWARE

DOWNLOAD

SLAVE

I2C

SENSOR I2C

USB

GUI

Figure 1. MAX32664 block diagram.

The MAXREFDES220# solution, which includes the MAX30101 and the MAX32664, provides an integrated hardware and software solution for finger-based applications. The MAX32664 is used as a sensor hub to collect data from the MAX30101 analog front end (AFE). The reference design also includes a tri-axis accelerometer (KX-122) to compensate for motion artifacts. (Accelerometer support in the MAXREFDES220# is optional.)

The MAX32630FTHR is used as a sample host is included in MAXREFDES220# reference design.

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MAXREFDES101#

The MAXREFDES101# is a unique evaluation and development platform in a wrist-worn wearable form factor that demonstrates the functions of a wide range of Maxim’s products for health-sensing applications.

MAX30001

ECG AFE

MAX32630

ARM Cortex

M4F MCU

MAX30205

TEMPERATURE SENSOR

BMP280

BAROMETRIC PRESSURE

BMI160

ACCELEROMETER/GYRO

MAX20303

POWER MANAGEMENT IC

MAX30001

ECG AFE

PAN1326B

BLUETOOTH/BLE

USB-C CONNECTOR

I2C

QSPI

MX25U12835FZ2I-10G

32MB FLASH MEMORY

MAX32664

BIOMETRIC SENSOR HUB

MAX86140

OPTICAL SENSOR

SENSOR BOARD

HEART RATE SENSOR HUB

I2C

UART

BootLoader

MICROCONTROLLER BOARD

I2C

Application Code

Driver Firmware and

HR Algorithm

KX122

3-AXIS

ACCEL

(optional)

SPI1

SPI0

Figure 2. MAXREFDES101# block diagram.

This second-generation health sensor platform (a follow-on to the MAXREFDES100#) integrates a PPG AFE sensor (MAX86141), a biopotential AFE (MAX30001), a human body temperature sensor (MAX30205), a microcontroller (MAX32630), a power-management IC (MAX20303), and a 6-axis accelerometer/gyroscope. The complete platform includes a watch enclosure and a biometric sensor hub with an embedded application code for heart-rate algorithm and AFE drivers (MAX32664)an embedded

heart-rate algorithm (MAX32664). Algorithm output and sensorraw data can be streamed through

Bluetooth® to an Android® application or PC GUI for demonstration, evaluation, and customized development.

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Android is a registered trademark of Google Inc.

The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Maxim is under license.

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MAX32664 GPIOs and RSTN Pin

To control and communicate with the MAX32664, the RSTN pin and GPIOs P0.1, P0.2, P0.3 of the MAX32664 are connected to the host as pictured in Figure 3Figure 3.

Figure 3. Pin connections between the host and the MAX32664.

The RSTN pin is used in conjunction with the GPIO P0.1 MFIO pin to control whether the MAX32664 starts up in Application mode or Bootloader mode. While in application mode, the MFIO pin can be configured to provide an interrupt signal to the host.

The host acts an I2C master to communicate with the MAX32664. GPIO P0.2 is used as the SCL line and GPIO P0.3 is used as the SDA line.

Table 2. RSTN Pin and GPIOs Pins

MAX32664

DESCRIPTION

DIRECTION FROM THE MAX32664 SIDE

Pin RSTN

Reset_N

Input

GPIO P0.1

GPIO MFIO interrupt to host, wake from host, bootloader/application on powerup,

Input/Output GPIO P0.2

I2C0_Host SCL

Input

GPIO P0.3

I2C0 Host SDA

Input/Output

Variations of the MAX32664 use additional GPIO pins in order to communicate and control sensor devices. For example, in the MAXREFDES220#, the additional GPIOs listed in Table 3 are used to control the sensors used.

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Table 3. Additional GPIOs Used on the MAX32664 for the MAXREFDES220#

MAX32664

DESCRIPTION

DIRECTION FROM THE MAX32664 SIDE

GPIO P0.6

KX122 ACCEL Interrupt

Input

GPIO P0.7

MAX30101 Interrupt

Input

GPIO P0.8

MAX30101, KX122 I2C1_SCL

Output

GPIO P0.9

MAX30101, KX122 I2C1_SDA

Input/Output

Table 4. Additional GPIOs Used on the MAX32664 for the MAXREFDES101#

MAX32664

DESCRIPTION

DIRECTION FROM THE MAX32664 SIDE

GPIO P0.0

KX122 ACCEL Select

Output

GPIO P0.4

SPI MISO: MAX86141, KX122

Input

GPIO P0.5

SPI MOSI: MAX86141, KX122

Output

GPIO P0.6

SPI CLK: MAX86141, KX122

Output

GPIO P0.7

MAX86141 Select

Output

GPIO P0.8

MAX86141 Interrupt

Input

GPIO P0.9

KX122 Interrupt

Input

MAX32664 Bootup and Application Mode

The MAX32664 is programmed to enter either bootloader mode or application mode at the start-up based on the state of the MFIO pin.

Variations of the MAX32664 part are pre-programmed with the different algorithms and application firmware. Check with your Maxim representative.

MAX32664 Bootloader Mode

The MAX32664 enters bootloader mode based on the sequencing of the RSTN pin and the MFIO pin. The necessary sequence is as follows:

• Set the RSTN pin low for 10ms.

• While RSTN is low, set the MFIO pin to low (MFIO pin should be set low at least 1ms before RSTN

pin is set high).

• After the 10ms has elapsed, set the RSTN pin high.

• After an additional 50ms has elapsed, the MAX32664 is in bootloader mode.

Figure 4. Entering bootloader mode using the RSTN pin and the MFIO GPIO pin.

MAX32664 Application Mode

The MAX32664 enters application mode based on the sequencing of the RSTN pin and the MFIO pin. The necessary sequence is as follows:

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• Set the RSTN pin low for 10ms.

• While RSTN is low, set the MFIO pin to high.

• After the 10ms has elapsed, set the RSTN pin high. (MFIO pin should be set high at least 1ms

before RSTN pin is set high).

• After an additional 50ms has elapsed, the MAX32664 is in application mode and the application

performs its initialization of the application software..

• After ~1 second from when the RSTN was set to high, the application completes the initialization

and the device is ready to accept I2C commands

Figure 5. Entering application mode using the RSTN pin and MFIO pin.

Communications to the MAX32664 over I2C

The host communicates to the MAX32664 through the I2C bus. The MAX32664 uses 0xAA as the I2C 8-bit slave write address and 0xXAB is used as the I2C 8-bit slave read address. The maximum I2C data rate supported is 3400 Kbps.

Bit Transfer Process

Both SDA and SCL signals are open-drain circuits. Each has an external pullup resistor that ensures each circuit is high when idle. The I2C specification states that during data transfer, the SDA line can change state only when SCL is low, and that SDA is stable and able to be read when SCL is high. Typical I2C write/read transactions are shown in Figure 6.

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Figure 6. I2C Write/Read data transfer from host microcontroller.

The read status byte is an indicator of the success or failure of the Write Transaction. The read status byte must be accessed after each write transaction to the device. This ensures that write transaction processing is understood and any errors in the device command handling can be corrected. The value of the read status byte is summarized in Table 54.

Table 54. Read Status Byte Value

STATUS BYTE

VALUE

DESCRIPTION

0x00

SUCCESS. The write transaction was successful.

0x01

ERR_UNAVAIL_CMD. Illegal Family Byte and/or Command Byte was used.

0x02

ERR_UNAVAIL_FUNC. This function is not implemented.

0x03

ERR_DATA_FORMAT. Incorrect number of bytes sent for the requested Family Byte.

0x04

ERR_INPUT_VALUE. Illegal configuration value was attempted to be set.

0x05

ERR_TRY_AGAIN. Device is busy. Try again.

0x80

ERR_BTLDR_GENERAL. General error while receiving/flashing a page during the bootloader sequence.

0x81

ERR_BTLDR_CHECKSUM. Checksum error while decrypting/checking page data.

0x82

ERR_BTLDR_AUTH. Authorization error.

0x83

ERR_BTLDR_INVALID_APP. Application not valid.

0xFF

ERR_UNKNOWN. Unknown Error.

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I2C Write

The process for an I2C write data transfer is as follows:

1. The bus master indicates a data transfer to the device with a START condition.

2. The master transmits one byte with the 7-bit slave address (most significant 7 bits of the 8-bit

address) and a single write bit set to zero. The eight bits to be transferred as a slave address for the MAX32664 is 0xAA for a write transaction.

3. During the next SCL clock following the write bit, the master releases SDA. During this clock period,

the device responds with an ACK by pulling SDA low.

4. The master senses the ACK condition and begins to transfer the Family Byte. The master drives

data on the SDA circuit for each of the eight bits of the Family byte, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication.

5. The master senses the ACK condition and begins to transfer the Index Byte. The master drives

data on the SDA circuit for each of the eight bits of the Index byte, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication.

6. The master senses the ACK condition and begins to transfer the Write Data Byte 0. The master

drives data on the SDA circuit for each of the eight bits of the Write Data Byte 0, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication.

7. The master senses the ACK condition and can begin to transfer another Write Data Byte if

required. The master drives data on the SDA circuit for each of the eight bits of the Write Data Byte, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication. If another Write Data Byte is not required, the master indicates the transfer is complete by generating a STOP condition. A STOP condition is generated when the master pulls SDA from a low to high while SCL is high.

8. The master waits for a period of CMD_DELAY (2 m60µsec) for the device to have its data ready.

9. The master indicates a data transfer to a slave with a START condition.

10. The master transmits one byte with the7-bit slave address and a single write bit set to one. This

is an indication from the master of its intent to read the device from the previously written location defined by the Family Byte and the Index Byte. The master then floats SDA and allows the device to drive SDA to send the Status Byte. The Status Byte reveals the success of the previous write sequence. After the Status Byte is read, the master drives SDA low to signal the end of data to the device.

11. The master indicates the transfer is complete by generating a STOP condition.

12. After the completion of the write data transfer, the Status Byte must be analyzed to determine if

the write sequence was successful and the device has received the intended command.

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I2C Read

The process for an I2C read data transfer is as follows:

1. The bus master indicates a data transfer to the device with a START condition.

2. The master transmits one byte with the 7-bit slave address and a single write bit set to zero. The

eight bits to be transferred as a slave address for the MAX32664 is 0xAA for a write transaction. This write transaction precedes the actual read transaction to indicate to the device what section is to be read.

3. During the next SCL clock following the write bit, the master releases SDA. During this clock period,

the device responds with an ACK by pulling SDA low.

4. The master senses the ACK condition and begins to transfer the Family Byte. The master drives

data on the SDA circuit for each of the eight bits of the Family byte, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication.

5. The master senses the ACK condition and begins to transfer the Index Byte. The master drives

data on the SDA circuit for each of the eight bits of the Index byte, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication.

6. The master senses the ACK condition and begins to transfer the Write Data Byte if necessary for

the read instruction. The master drives data on the SDA circuit for each of the eight bits of the Write Data byte, and then floats SDA during the ninth bit to allow the device to reply with the ACK indication.

7. The master indicates the transfer is complete by generating a STOP condition.

8. The master waits for a period of CMD_DELAY (2 msec60µs) for the device to have its data ready.

9. The master indicates a data transfer to a slave with a START condition.

10. The master transmits one byte with the 7-bit slave address and a single write bit set to one. This

11. The master floats SDA and allows the device to drive SDA to send Read Data Byte 0. After Read

Data Byte 0 is read, the master drives SDA low to acknowledge the byte.

12. The master floats SDA and allows the device to drive SDA to send the Read Data Byte N. After

Read Data Byte N is read, the master drives SDA low to acknowledge the Read Data Byte N. This process continues until the device has provided all the data that the master expects based upon the Family Byte and Index Byte definition.

13. The master indicates the transfer is complete by generating a STOP condition.

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MAX32664 I2C Message Protocol Definition

Table 65 defines the I2C message protocol for the MAX32664.

Table 56. MAX32664 I2C Message Protocol Definitions

HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Read Sensor Hub Status

Read sensor hub status

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x00

Err0[0]: 0 = No Error; 1 = Sensor Communication Problem

Err1[0]: Not used Err2[0]: Not used DataRdyInt[3]: 0 = FIFO below

threshold; 1 = FIFO filled to threshold or above. FifoOutOvrInt[4]: 0 = No FIFO overflow; 1 = Sensor Hub Output FIFO overflowed, data lost. FifoInOvrInt[5]: 0 = No FIFO overflow; 1 = Sensor Hub Input FIFO overflowed, data lost. DevBusy[6]: 0 = Sensor Hub ready; 1 = Sensor Hub is busy processing.

See Table 76 for the for the bit field table.

Device Mode

Select the device operating mode. The application must implement this.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x01

0x00

0x00: Exit bootloader mode,

Enter application mode.

0x02: Reset. 0x08: Enter bootloader

mode.

Device Mode

Read the device operating mode.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x02

0x00

0x00: Application operating mode. 0x08: Bootloader operating mode.

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Set Output Mode

Set the output format of the sensor hub.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x10

0x00

0x00: Pause (no data) 0x01: Sensor Data 0x02: Algorithm Data 0x03: Sensor Data and

Algorithm Data

0x04: Pause (no data) 0x05: Sample Counter byte,

Sensor Data 0x06: Sample Counter byte, Algorithm Data 0x07: Sample Counter byte, Sensor Data and Algorithm Data

Set Output Mode

Set the threshold for the FIFO interrupt bit/pin. The MFIO pin is used as the interrupt and the host should configure this pin as an input interrupt pin. The status bit DataRdyInt is set when this threshold is reached.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x10

0x01

0x01 to 0xFF: Sensor Hub Interrupt Threshold for FIFO

almost full.

Read Output Mode

READ the output format of the sensor hub. (MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x11

0x00

0x00: Pause (no data) 0x01: Sensor Data 0x02: Algorithm Data 0x03: Sensor Data and Algorithm Data 0x04: Pause (no data) 0x05: Sample Counter byte, Sensor

Data 0x06: Sample Counter byte, Algorithm Data 0x07: Sample Counter byte, Sensor Data and Algorithm Data

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Read Output Mode

Read the threshold for the FIFO interrupt bit/pin. The MFIO pin is used as the interrupt and the host should configure this pin as an input interrupt pin. The status bit DataRdyInt is set when this threshold is reached. (MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x11

0x01

0x01 to 0xFF: Sensor Hub Interrupt Threshold for FIFO.

Read Output FIFO

Get the number of samples available in the FIFO.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x12

0x00

Number of samples available in the FIFO.

Read Output FIFO

Read data stored in output FIFO.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x12

0x01

See Table 87, Output FIFO Format Definitions. The internal FIFO read pointer increments once the sample size bytes have been read.

Read Input FIFO for External Sensors (e.g., systems that have an externally supplied accelerometer)

Read the sensor sample size.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC)

0x13

0x00

0x04: Accelerometer

0x06: Bytes per sample for the

external accelerometer. Three 16-bit 2’s complement with LSB = 0.001g.

See Table 98 for an example.

Read Input FIFO for External Sensors

Read the input FIFO size for the maximum number of samples that the input FIFO can hold (16-bit).

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x13

0x01

MSB, LSB Read Input FIFO for External Sensors

Read the sensor FIFO size for the maximum number of samples that the sensor FIFO can hold (16-bit).

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC)

0x13

0x02

0x04: Accelerometer

MSB, LSB

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Read Input FIFO for External Sensors

Read the number of samples currently in the input FIFO (16bit).

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC)

0x13

0x03

0x04: Accelerometer

MSB, LSB

Read Input FIFO for External Sensors

Read the number of samples currently in the sensor FIFO (16bit).

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x13

0x04

MSB, LSB

Write Input FIFO for External Sensors

Write data to the input FIFO.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x14

0x004

Number of Samples, Sample

1 values, …, Sample Nn values

See Table 9 for an example.

Write Register

Write a value to a writable MAX86140/ MAX86141 register.

(MAX32664GWEB, MAX32664GWEC)

0x40

0x00

Write Register

Write a value to a writable MAX30205 register.

(MAX32664GWEB)

0x40

0x01

Write Register

Write a value to a writable MAX30001 register.

(MAX32664GWEB)

0x40

0x02

Write Register

Write a value to a writable MAX30101 register.

(MAX32664GWEA, MAX32664GWED)

0x40

0x03

Write Register

Write a value to a writable accelerometer sensor register.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC)

0x40

0x04

Read Register

Read the value of a MAX86140/ MAX86141 register.

(MAX32664GWEB, MAX32664GWEC)

0x41

0x00

Read Register

Read the value of a MAX30205 register.

(MAX32664GWEB)

0x41

0x01

Page 23

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Read Register

Read the value of a MAX30001 register.

(MAX32664GWEB)

0x41

0x02

Read Register

Read the value of a MAX30101 register.

(MAX32664GWEA, MAX32664GWED)

0x41

0x03

Read Register

Read the value of an accelerometer sensor register.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x41

0x04

Retrieve the attributes of the MAX86140/ MAX86141 AFE.

(MAX32664GWEB, MAX32664GWEC)

0x42

0x00

Number of bytes in a word for this sensor, Number of registers available for this sensor.

Get Attributes of the AFE

Retrieve the attributes of the MAX30205 AFE.

(MAX32664GWEB)

0x42

0x01

Number of bytes in a word for this sensor, Number of registers available for this sensor.

Get Attributes of the AFE

Retrieve the attributes of the MAX30001 AFE.

(MAX32664GWEB)

0x42

0x02

Number of bytes in a word for this sensor, Number of registers available for this sensor.

Get Attributes of the AFE

Retrieve the attributes of the MAX30101 AFE.

(MAX32664GWEA, MAX32664GWED)

0x42

0x03

Number of bytes in a word for this sensor, Number of registers available for this sensor.

Get Attributes of the AFE

Retrieve the attributes of the accelerometer sensor AFE.

(MAX32664GWEA, MAX32664GWEB, (MAX32664GWEC, MAX32664GWED)

0x42

0x04

Number of bytes in a word for this sensor, Number of registers available for this sensor.

Dump Registers

Read all the MAX86140/ MAX86141 registers.

(MAX32664GWEB, MAX32664GWEC)

0x43

0x00

Dump Registers

Read all the MAX30205 registers.

(MAX32664GWEB)

0x43

0x01

Dump Registers

Read all the MAX30001 registers.

(MAX32664GWEB)

0x43

0x02

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Dump Registers

Read all the MAX30101 registers.

(MAX32664GWEA, MAX32664GWED)

0x43

0x03

Dump Registers

Read all the accelerometer sensor registers.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x43

0x04

Sensor Mode Enable

Enable the MAX86140/ MAX86141 sensor.

(MAX32664GWEB, MAX32664GWEC)

0x44

0x00

0x00: Disable 0x01: Enable

Sensor Mode Enable

Enable the MAX30205 sensor.

(MAX32664GWEB)

0x44

0x01

0x00: Disable 0x01: Enable

Sensor Mode Enable

Enable the MAX30001 sensor.

(MAX32664GWEB)

0x44

0x02

0x00: Disable 0x01: Enable

Sensor Mode Enable

Enable the MAX30101 sensor.

(MAX32664GWEA, (MAX32664GWED)

0x44

0x03

0x00: Disable 0x01: Enable

Sensor Mode Enable

Enable the external

accelerometer

sensor. This

command is used when host accelerometer data is supplied to the sensor hub.(MAX32664GWE

A, MAX32664GWEB, MAX32664GWEC)

0x44

0x04

0x00: Disable, 0x00: Sensor

Hub accelerometer 0x00: Disable, 0x01: External Host accelerometer

0x01: Enable, 0x00: Sensor

Hub accelerometer 0x01: Enable, 0x01: External Host accelerometer

Sensor Mode Read

Read the MAX86140/ MAX86141 sensor mode. (MAX32664GWEB, MAX32664GWEC)

0x45

0x00

0x00: Disabled 0x01: Enabled

Sensor Mode Read

Read the MAX30205 sensor mode. (MAX32664GWEB)

0x45

0x01

0x00: Disabled 0x01: Enabled

Sensor Mode Read

Read the MAX30001 sensor mode. (MAX32664GWEB)

0x45

0x02

0x00: Disabled 0x01: Enabled

Sensor Mode Read

Read the MAX30101 sensor mode. (MAX32664GWEA, (MAX32664GWED)

0x45

0x03

0x00: Disabled 0x01: Enabled

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Sensor Mode Read

Read the external

accelerometer

sensor mode.

(MAX32664GWEA,

MAX32664GWEB, MAX32664GWEC)

0x45

0x04

0x00: Disabled, 0x00: Sensor Hub accelerometer 0x00: Disabled, 0x01: External Host accelerometer 0x01: Enabled, 0x00: Sensor Hub accelerometer 0x01: Enabled, 0x01: External Host accelerometer

Algorithm Configuration

Automatic Gain Control (AGC) algorithm: Set the target percentage of the full-scale ADC range that the automatic gain control (AGC) algorithm uses.

(MAX32664GWEA,

MAX32664GWED)

0x50

0x00

0x00, 0 to 100 percent

Algorithm Configuration

AGC algorithm: Set the step size toward the target for the AGC algorithm.

(MAX32664GWEA,

MAX32664GWED)

0x50

0x00

0x01, 0 to 100 percent

Algorithm Configuration

AGC algorithm: Set the sensitivity for the AGC algorithm.

(MAX32664GWEA,

MAX32664GWED)

0x50

0x00

0x02,. 0 to 100 percent

Algorithm Configuration

AGC algorithm: Set the number of samples to average for the AGC algorithm.

(MAX32664GWEA)

0x50

0x00

0x03, Number of samples to average (range is 0 to 255).

Algorithm Configuration

Wrist Heart Rate Monitor (WHRM) algorithm: Set the sample rate for the WHRM algorithm. The WHRM algorithm is configured to use the LED1 and Photo- diode 1 (25Hz sample rate) and is compatible with the MAX86141 AFE, KX122 accelerometer.

(MAX32664GWEB)

0x50

0x02

0x00, MSB of sample rate, LSB of sample rate (16-bit unsigned integer)

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration

WHRM algorithm: Set the maximum allowed height (cm).

(MAX32664GWEB)

0x50

0x02

0x01, MSB of height, LSB of height (16-bit unsigned integer)

Algorithm Configuration

WHRM algorithm: Set the maximum allowed weight (kg).

(MAX32664GWEB)

0x50

0x02

0x02, MSB of weight, LSB of weight (16-bit unsigned integer)

Algorithm Configuration

WHRM algorithm: Set the maximum allowed age (years).

(MAX32664GWEB)

0x50

0x02

0x03, Age

Algorithm Configuration

WHRM algorithm: Set the minimum allowed height (cm).

(MAX32664GWEB)

0x50

0x02

0x04, MSB of height, LSB of height (16-bit unsigned integer)

Algorithm Configuration

WHRM algorithm: Set the minimum allowed weight (kg).

(MAX32664GWEB)

0x50

0x02

0x05, MSB of weight, LSB of weight (16-bit unsigned integer)

Algorithm Configuration

WHRM algorithm: Set the minimum allowed age (years).

(MAX32664GWEB)

0x50

0x02

0x06, Age

Algorithm Configuration

WHRM algorithm: Set the default height (cm).

(MAX32664GWEB)

0x50

0x02

0x07, MSB of height, LSB of height (16-bit unsigned integer)

Algorithm Configuration

WHRM algorithm: Set the default weight (kg).

(MAX32664GWEB)

0x50

0x02

0x08, MSB of weight, LSB of weight (16-bit unsigned integer)

Algorithm Configuration

WHRM algorithm: Set the default age (years).

(MAX32664GWEB)

0x50

0x02

0x09, Age

Algorithm Configuration

WHRM algorithm: Set the initial heart-rate value in bpm which might speed up the algorithm.

(MAX32664GWEB)

0x50

0x02

0x0A, Heart rate (bpm)

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration

MaximFast algorithm: Set the MaximFast SpO2 coefficients.

(MAX32664GWEA)

0x50

0x02

0x0B, four bytes signed integer A, four bytes signed integer B, four bytes signed integer C (32-bit integers which are the coefficients times 100,000)

The MAXREFDES220# without the cover glass uses the following coefficients as the default values: A = 159584 B = -3465966 C = 11268987

Algorithm Configuration

WHRM algorithm: Enable automatic exposure control (AEC) algorithm.

(MAX32664GWEB)

0x50

0x02

0x0B, 0x00: Disable 0x0B, 0x01: Enable

Algorithm Configuration

WHRM algorithm: Enable skin contact detection (SCD) algorithm.

(MAX32664GWEB)

0x50

0x02

0x0C, 0x00: Disable 0x0C, 0x01: Enable

Algorithm Configuration

WHRM algorithm: Set adjusted target photo detector (PD) current period in seconds.

(MAX32664GWEB)

0x50

0x02

0x0D, MSB, LSB (unsigned 16bit integer)

Algorithm Configuration

WHRM algorithm: Set SCD debounce window.

(MAX32664GWEB)

0x50

0x02

0x0E, MSB, LSB (unsigned 16bit integer)

Algorithm Configuration

WHRM algorithm: Set motion magnitude threshold in 0.1g.

(MAX32664GWEB)

0x50

0x02

0x0F, MSB, LSB (unsigned 16bit integer)

Algorithm Configuration

WHRM algorithm: Set the minimum PD current in 0.1mA.

(MAX32664GWEB)

0x50

0x02

0x10, MSB, LSB (unsigned 16bit integer)

Algorithm Configuration

WHRM algorithm: Configure the source of the PPG signal for the PD.

(MAX32664GWEB)

0x50

0x02

0x11, 0x01: PD1 0x11, 0x02: PD2 0x11, 0x03: PD1 and PD2

Algorithm Configuration

Blood Pressure Trending (BPT) algorithm: Set if the user is on blood pressure medication.

(MAX32664GWED)

0x50

0x04

0x00, 0x00: Not using blood pressure (BP) medication 0x00, 0x01: Using BP medication

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration

BPT algorithm: Write the three samples of the diastolic BP byte values needed by the calibration procedure.

(MAX32664GWED)

0x50

0x04

0x01, diastolic value 1, diastolic value 2, diastolic value 3

Algorithm Configuration

BPT algorithm: Write the three samples of the systolic BP byte values needed by the calibration procedure.

(MAX32664GWED)

0x50

0x04

0x02, systolic value 1, systolic value 2, systolic value 3

Algorithm Configuration

BPT algorithm: Write

the calibration data for this user.Calibrate the BPT algorithm using the result of the calibration procedure. (Use the

data from the 0x51 0x04 0x03 command).

(MAX32664GWED)

0x50

0x04

0x03, 824608 bytes of calibration data

Algorithm Configuration

BPT algorithm: Set the estimation date, using the current date. The year is sent as a 16-bit unsigned integer, and the month and day are bytes.

0x50

0x04

0x04, year MSB, year LSB, month, day

Algorithm Configuration

BPT algorithm: Configure whether the user is not resting or resting.

(MAX32664GWED)

0x50

0x04

0x05, 0x00: Resting 0x05, 0x01: Not resting

Algorithm Configuration

BPT algorithm: Set the SpO2 coefficients A, B, C.

Defaults: C = 0x42E16137 B = 0xC20AA37F A = 3FCC448F(MAX3266 4GWED)

0x50

0x04

0x0B, four bytes signed integer A, four bytes signed integer B, four bytes signed integer C (32-bit integers which are the coefficients times 100,000)

The MAXREFDES220# without the cover glass uses the following coefficients as the default values: A = 159584 B = -3465966 C = 112689870x06, four bytes float C, four bytes float B, four bytes float A

Page 29

Maxim Integrated Page 29 of 52

HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration

SpO2 on the wrist (WSpO2) algorithm: Set the WSpO2 coefficients. WSpO2 is a Maxim supplied algorithm for measuring SpO2 on the wrist. Defaults: A = 159584 B = -3465966 C = 11268987

(MAX32664GWEC)

0x50

0x05

0x00, four bytes signed integer A, four bytes signed integer B, four bytes signed integer C (32-bit integers which are the coefficients times 100,000).

Algorithm Configuration

WSpO2 algorithm: Set the sample rate.

(MAX32664GWEC)

0x50

0x05

0x01, 0x00: 100Hz 0x01, 0x01: 25Hz

Algorithm Configuration

WSpO2 algorithm: Set the algorithm run mode.

(MAX32664GWEC)

0x50

0x05

0x02, 0x00: Continuous 0x02, 0x01: One-shot

Algorithm Configuration

WSpO2 algorithm: Set the AGC mode for the WSpO2 algorithm.

(MAX32664GWEC)

0x50

0x05

0x03, 0x00: Disable 0x03, 0x01: Enable

Algorithm Configuration

WSpO2 algorithm: Set motion detection.

(MAX32664GWEC)

0x50

0x05

0x04, 0x00: Disable 0x04, 0x01: Enable

Algorithm Configuration

WSpO2 algorithm: Set the motion detection period,

seconds. (MAX32664GWEC)

0x50

0x05

0x05, MSB of Period, LSB of Period (16-bit unsigned integer)

Algorithm Configuration

WSpO2 algorithm: Set the motion threshold for the WSpO2 algorithm in

0.00001 g. (MAX32664GWEC)

0x50

0x05

0x06, 4 bytes (a 32-bit signed integer, which is the motion threshold value times 100,000)

Algorithm Configuration

WSpO2 algorithm: Set WSpO2 AGC Timeout (sec).

(MAX32664GWEC)

0x50

0x05

0x07, 8-bit unsigned value

Algorithm Configuration

WSpO2 algorithm: Set WSpO2 Algorithm Timeout (sec).

(MAX32664GWEC)

0x50

0x05

0x08, 8-bit unsigned value

Algorithm Configuration

WSpO2 algorithm: Set WSpO2 PD configuration (source of PPG signal).

(MAX32664GWEC)

0x50

0x05

0x09, 0x01: PD1 0x09, 0x02: PD2

0x09, 0x02: PD1, PD2

Page 30

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration Read

Automatic Gain Control (AGC) algorithm: Read the target percentage of the full-scale ADC range that the AGC algorithm is using.

(MAX32664GWEA,

MAX32664GWED))

0x51

0x00

0 to 100 Percent

Algorithm Configuration Read

AGC algorithm: Read step size toward the target.

(MAX32664GWEA,

MAX32664GWED)

0x51

0x00

0x01

0 to 100 Percent

Algorithm Configuration Read

AGC algorithm: Read the sensitivity for the AGC algorithm.

(MAX32664GWEA,

MAX32664GWED)

0x51

0x00

0x02

0 to 100 Percent

Algorithm Configuration Read

AGC algorithm: Read the number of samples to average for the AGC algorithm.

(MAX32664GWEA,

MAX32664GWED)

0x51

0x00

0x03

Number of samples to average (range is 0 to 255) Algorithm Configuration Read

Wrist Heart Rate Monitor (WHRM) algorithm: Read the sample rate.

(MAX32664GWEB)

0x51

0x02

0x00

MSB of sample rate, LSB of sample rate (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the maximum allowed height (cm).

(MAX32664GWEB)

0x51

0x02

0x01

MSB of height, LSB of height (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the maximum allowed weight (kg).

(MAX32664GWEB)

0x51

0x02

MSB of weight, LSB of weight (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the maximum allowed age (years).

(MAX32664GWEB)

0x51

0x02

0x03

Age

Algorithm Configuration Read

WHRM algorithm: Read the minimum allowed height (cm).

(MAX32664GWEB)

0x51

0x02

0x04

MSB of height, LSB of height (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the minimum allowed weight (kg).

(MAX32664GWEB)

0x51

0x02

0x05

MSB of weight, LSB of weight (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the minimum allowed age (years).

(MAX32664GWEB)

0x51

0x02

0x06

Age

Page 31

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration Read

WHRM algorithm: Read the default height (cm).

(MAX32664GWEB)

0x51

0x02

0x07

MSB of height, LSB of height (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the default weight (kg).

(MAX32664GWEB)

0x51

0x02

0x08

MSB of weight, LSB of weight (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the default age (years).

(MAX32664GWEB)

0x51

0x02

0x09

Age

Algorithm Configuration Read

WHRM algorithm: Read the initial heart rate value in bpm which can speed up the algorithm.

(MAX32664GWEB)

0x51

0x02

0x0A

Heart rate (bpm)

Algorithm Configuration Read

MaximFast algorithm: Read the coefficients for the MaximFast SpO2 algorithm.

(MAX32664GWEA)

0x51

0x02

0x0B

Four bytes signed integer A, Four bytes signed integer B, Four bytes signed integer C (32-bit integers which are the coefficients times 100,000).

Algorithm Configuration Read

WHRM algorithm: Read the AEC algorithm enable status.

(MAX32664GWEB)

0x51

0x02

0x0B

0x00: Disabled 0x01: Enabled

Algorithm Configuration Read

WHRM algorithm: Read the SCD algorithm enable status.

(MAX32664GWEB)

0x51

0x02

0x0C

0x00: Disabled 0x01: Enabled

Algorithm Configuration Read

WHRM algorithm: Read the adjusted target PD current period in seconds.

(MAX32664GWEB)

0x51

0x02

0x0D

MSB, LSB (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the SCD debounce window.

(MAX32664GWEB)

0x51

0x02

0x0E

MSB, LSB (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the motion magnitude threshold in 0.1g.

(MAX32664GWEB)

0x51

0x02

0x0F

MSB, LSB (16-bit unsigned integer)

Algorithm Configuration Read

WHRM algorithm: Read the minimum PD current in 0.1mA.

(MAX32664GWEB)

0x51

0x02

0x10

MSB, LSB (16-bit unsigned integer)

Page 32

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration Read

WHRM algorithm: Read the PD configuration of the PPG signal source.

(MAX32664GWEB)

0x51

0x02

0x11

0x01: PD1 0x02: PD2 0x03: PD1 and PD2

Algorithm Configuration Read

BPT algorithm: Read the calibration data results from the calibration procedure. Host may

use this for saving the user calibration data when switching users or for writing user calibration data after a reset. (MAX32664GWED)

0x51

0x04

0x03

824608 bytes of calibration data

Algorithm Configuration Read

WSpO2 algorithm: Read coefficients A, B, C.

(MAX32664GWEC)

0x51

0x05

0x00

Four bytes signed integer A, Four bytes signed integer B, Four bytes signed integer C

Algorithm Configuration Read

WSpO2 algorithm: Read the sample rate.

(MAX32664GWEC)

0x51

0x05

0x01

0x00: 100 Hz 0x01: 25 Hz

Algorithm Configuration Read

WSpO2 algorithm: Read the algorithm run mode.

(MAX32664GWEC)

0x51

0x05

0x02

0x00: Continuous 0x01: One-shot

Algorithm Configuration Read

WSpO2 algorithm: Read the AGC mode status.

(MAX32664GWEC)

0x51

0x05

0x03

0x00: Disabled 0x01: Enabled

Algorithm Configuration Read

WSpO2 algorithm: Read the motion detection status.

(MAX32664GWEC)

0x51

0x05

0x04

0x00: Disabled 0x01: Enabled

Algorithm Configuration Read

WSpO2 algorithm: Read the motion detection period,

seconds. (MAX32664GWEC)

0x51

0x05

MSB of Period, LSB of Period (16-bit unsigned integer))

Algorithm Configuration

WSpO2 algorithm: Read the motion threshold for the WSpO2 algorithm.

(MAX32664GWEC)

0x51

0x05

0x06

4 bytes (32-bit signed integers which are the motion threshold times 100,000)

Algorithm Configuration Read

WSpO2 algorithm: Read the AGC timeout (sec).

0x51

0x05

0x07

AGC timeout (8-bit unsigned)

Algorithm Configuration Read

WSpO2 algorithm: Read Algorithm Timeout (sec)

(MAX32664GWEC)

0x51

0x05

0x08

WSpO2 algorithm timeout (8-bit unsigned)

Page 33

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Algorithm Configuration Read

WSpO2 algorithm: Read the PD configuration (source of PPG signal).

(MAX32664GWEC)

0x51

0x05

0x09

0x01: PD1 0x02: PD2

0x03: PD1, PD2

Algorithm Mode Enable

AGC: Enable the AGC algorithm.

(MAX32664GWEA)

0x52

0x00

0x00: Disablee 0x01: Enable

Algorithm Mode Enable

AEC: Enable the AEC algorithm.

0x52

0x01

0x00: Disable 0x01: Enable

Algorithm Mode Enable

WHRM, MaximFast: Enable the WHRM, MaximFast algorithm.

(MAX32664GWEA, MAX32664GWEB)

0x52

0x02

0x00: Disable 0x01: Enable Mode 1

0x02: Enable Mode 2

(See Table 8 for Algorithm Mode definitions)

Algorithm Mode Enable

Electrocardiogram (ECG): Enable the ECG algorithm.

(MAX32664GWEB)

0x52

0x03

0x00: Disable 0x01: Enable

Algorithm Mode Enable

Blood Pressure Trending (BPT): Enable the BPT algorithm.

(MAX32664GWED)

0x52

0x04

0x00: Disable 0x01: Enable Calibration

Mode 0x02: Enable Estimation Mode

Algorithm Mode Enable

WSpO2: Enable the algorithm.

(MAX32664GWEC)

0x52

0x05

0x00: Disable 0x01: Enable Mode 1

Bootloader

Flash

Set the initialization vector (IV) bytes.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)Thi s is not required for a non-secure bootloader.

0x80

0x00

Use bytes 0x28 to 0x32 from the .msbl file as the IV bytes

Bootloader Flash

Set the authentication bytes..

This is not required for a non-secure bootloader.(MAX326 64GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x80

0x01

Use bytes 0x34 to 0x43 from the .msbl file.

Bootloader Flash

Set the number of pages.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x80

0x02

0x00, Number of pages located at byte 0x44 from the .msbl file.

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HOST COMMAND

MAX32664

FAMILY NAME

DESCRIPTION

FAMILY

BYTE

INDEX

BYTE

WRITE BYTES

RESPONSE BYTES

Bootloader Flash

Erase the application flash memory.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x80

0x03

Bootloader Flash

Send the page values.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x80

0x04

The first page is specified by byte 0x4C from the .msbl file. The total bytes for each message protocol are the page size + 16 bytes of CRC.

Bootloader Information

Get bootloader version.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x81

0x00

Major version byte, Minor version byte, Revision byte

Bootloader Information

Get the page size in bytes.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0x81

0x01

Upper byte of page size, Lower byte of page size

Identity

Read the MCU type.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0xFF

0x00

0x00: MAX32625 0x01: MAX32660/MAX32664

Identity

Read the sensor hub version.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0xFF

0x03

Major version byte, Minor version byte, Revision byte

Identity

Read the algorithm: version.

(MAX32664GWEA, MAX32664GWEB, MAX32664GWEC, MAX32664GWED)

0xFF

0x07

Major version byte, Minor version byte, Revision byte

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Table 76 defines the bit fields of the sensor hub status byte.

Table 67. Sensor Hub Status Byte

BIT 7 6 5 4 3 2 1 0

Field

Reserved

DevBusy

FifoInOverInt

FifoOutOvrInt

DataRdyInt

Err2

Err1

Err0

Table 8, 7 defines the output FIFO format for the Read Output FIFO I2C message for

MAX32664GWEA/B/C/D..

Table 87. Output FIFO Format Definitions

SENSOR OR ALGORITHM

SIZE

(BYTES)

DESCRIPTION

MAX30101 (MAX32664GWEA, MAX32664GWED)

LED1 value: 24-bit. IR LED count.

LED2 value: 24-bit. Red LED count.

LED3 value: 24-bit (N/A).

LED4 value: 24-bit (N/A).

MAX86140/MAX86141 (MAX32664GWEB)

Seq1Data valueLED1 value: 24-bit. Green LED, PD1 count.

Seq2Data value: LED2 value: 24-bit (N/A)..

Seq3Data value: LED3 value: 24-bit (N/A)..

Seq4DataLED4 value: 24-bit. Green LED, PD2 count.

Seq5DataLED5 value: 24-bit (N/A)..

Seq6DataLED5 value: 24-bit (N/A)..

MAX86141 (MAX32664GWEC)

Seq1Data value: 24-bit (N/A).

Seq2Data value: 24-bit (N/A).

Seq3Data value: 24-bit (N/A).

Seq4Data value: 24-bit.Red LED count.

Seq5Data value: 24-bit. IR LED count.

Seq6Data value: 24-bit (N/A).

MAX30205

(MAX32664GWEB)

Temperature value: 16 bits, LSB = 0.00390625°C.

MAX30001 (MAX32664GWEB)MAX30001

ECG: 24-bit.

R-to-R: 24-bit.

BIOZ: 24-bit.

PACE: 24-bit.

KX-122 Accelerometer (MAX32664GWEA, MAX32664GWEB, MAX32664GWEC)

X: 16-bit two's compliment. LSB = 0.001g

Y: 16-bit two's compliment. LSB = 0.001g

Z: 16-bit two's compliment. LSB = 0.001g

AGC Algorithm

No output from algorithm.

AEC Algorithm

No output from algorithm.

WHRM/MaximFast

Heart Rate (bpm): 16-bit, LSB = 0.1 bpm

Confidence level (0 - 100%): 8-bit, LSB = 1%

SpO2 value (0 - 100%): 16-bit, LSB = 0.1%

WHRM State Machine Status Codes (signed 8-bit): 0: Success +1: Not ready

-1: Object detected

-2: Excessive sensor device motion

-3: No object detected

-4: Pressing too hard

-5: Object other than finger detected

-6: Excessive finger motion

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SENSOR OR ALGORITHM

SIZE

(BYTES)

DESCRIPTION

MaximFast State Machine Status Codes: 0: No object detected. 1: Object detected. 2: Object other than finger detected 3: Finger detected.

MaximFast Algorithm, Mode 1 (MAX32664GWEA)

Heart Rate (bpm): 16-bit, LSB = 0.1 bpm

Confidence level (0 - 100%): 8-bit, LSB = 1%

SpO2 value (0 - 100%): 16-bit, LSB = 0.1%

MaximFast State Machine Status Codes: 0: No object detected. 1: Object detected. 2: Object other than finger detected 3: Finger detected.

MaximFast Algorithm Mode 2 (Sensor Hub v10.1.0 or above) (MAX32664GWEA)

Heart Rate (bpm): 16-bit, LSB = 0.1 bpm

Confidence level (0 - 100%): 8-bit, LSB = 1%

SpO2 value (0 - 100%): 16-bit, LSB = 0.1%

MaximFast State Machine Status Codes: 0: No object detected. 1: Object detected. 2: Object other than finger detected 3: Finger detected.

r: 16-bit LSB = 0.1 SpO2 r value.

MaximFast State Machine Extended Status Codes: 0: Success +1: Not ready

-1: Object detected

-2: Excessive sensor device motion

-3: No object detected

-4: Pressing too hard

-5: Object other than finger detected

-6: Excessive finger motion

0 (reserved for future use)

AGC Algorithm (MAX32664GWEA, MAX32664GWED)

No output from algorithm.

WHRM Algorithm Mode 1 (MAX32664GWEB)

Heart Rate (bpm): 16-bit, LSB = 0.1 bpm

Confidence level (0 - 100%): 8-bit, LSB = 1%

SpO2 value (0 - 100%): 16-bit, LSB = 0.1%

WHRM State Machine Status Codes (signed 8-bit): 0: Success +1: Not ready

-1: Object detected

-2: Excessive sensor device motion

-3: No object detected

-4: Pressing too hard

-5: Object other than finger detected

-6: Excessive finger motion

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SENSOR OR ALGORITHM

SIZE

(BYTES)

DESCRIPTION

WSpO2 Algorithm Mode 1

(MAX32664GWEC)

r: 10x SpO2 r value.

SpO2 confidence in %.

10x the measured value of SpO2.

SpO2 calculation progress (%) - only in one-shot mode.

lowSNRflag: A flag showingwing low SNR .

Motion flag: A flag showing highexcessve motion.

isWSpo2 State: Algorithm reported state: 0: Adjustment state 1: Computation state 2: Successful state 3: Timeout stateIsWSpo2Calculated: Algorithm reported status.

BPT (MAX32664GWD)

Calibration/estimation mode status. 0: No Signal 1: In Progress 2: Successful 3: Bad Signal 4: Implied Motion Detected 5: Failure 6: Calibration Done

Calibration mode progress. Value ranges from 0 to 100. 100 meaning calibration is complete.

Heart rate (bpm). LSB = 0.1 bpm.

Systolic BP value. Only valid once progress = 100.

Diastolic BP value. Only valid once progress = 100.

SpO2 value (70% - 100%): 16-bit, LSB = 0.1%

r: 16-bit LSB = 0.1 SpO2 r value.

HRaboveResting flag: a flag showing non-resting heart rate (>95 bpm)

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Table 89 provides the sequence of commands for writing external accelerometer data to the input FIFO.

Table 8. Sequence of Commands to Write External Accelerometer Data to the Input FIFO

Table 9. Sequence of Commands to Write External Accelerometer Data to the Input FIFO (MAX32664GWEA/B/C)

HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x10 0x00 0x03†0xAA 0x44 0x04 0x1

Set output mode to sensor and algorithm data.Enable the input FIFO for host supplied accelerometer data.

0xAB 0x000xAB 0x00

No error. No error.

0xAA 0x10 0x01 0x0F*

Enable the input FIFO for host supplied accelerometer data.

0xAB 0x00

No error.

0xAA 0x44 0x03 0x01*

Enable the MAX30101 sensor. (MAX32664GWEA)

0xAB 0x00

No error.

0xAA 0x44 0x04 0x01 0x01*

Enable the input FIFO for host supplied accelerometer data.

0xAB 0x00

No error.

0xAA 0x52 0x02 0x01*

Enable MaximFast algorithm mode 1. (MAX32664GWEA)

0xAB 0x00

No error.

0xAA 0x13 0x00 0x04†

Read the sensor sample size for the accelerometer. (optional)

0xAB 0x00 0x06

No error. 6 bytes is the sample size.

0xAA 0x14 0x00 Sample 1 values, …, Sample N values*

Write data to the input FIFO. Six bytes per accelerometer sample.

0xAB 0x00

No error.

0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x0F

No error. 0x0F samples are in the FIFO.

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0x6A 0x43 0x03 0x04 0x92 0x00 0x00 0x00 0x00 0x2E 0x15 0xFC 0xD8 0x00 0x04 0x02 0x3e 0x02 0x76 0x63 0x03 0xE4 0x03, data for fourteen other samples

No error. IR counts = 223811, Red counts = 19778, LED3 = 0, LED4 = 11797, X accelerometer = -0.808, Y accelerometer =

0.004, Z accelerometer =

0.574, Heart Rate = 63.0, Confidence = 99, SpO2 = 99.6, MaximFast State Machine Status = 3, data for fourteen other samples.

0xAA 0x13 0x00 0x04

Read the sensor sample size for the accelerometer. (optional)

0xAB 0x00 0xN

No error. N is the number of samples in the FIFO.

0xAA 0x14 0x04 Number of Samples, Sample 1 values, …, Sample N values

Write data to the input FIFO.

0xAB 0x00

No error.

0xAA 0x00 0x00

Read the sensor hub status to verify that the FifoOutOvrInt bit 4 is not set in the Sensor Hub Status byte. (optional)

0xAB 0x00 0x88

No error. Sensor hub is not busy.

*Mandatory †Recommended

MAX32664 I2C Annotated Application Mode Example

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Table 109 shows a capture of the I2C traffic between the example host microcontroller (MAX32630FTHR) and the MAX32664GWEA for commanding the MAX32664GWEA to stream sensorraw and algorithm data

(mode 1). The MAXREFDES220# is used for this example.

Table 109. MAX32664GWEA I2C Annotated Application Mode Example

HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x02 0x00†

Read device mode.

0xAB 0x00 0x00

No error. Mode is application operating mode.

0xAA 0xFF 0x03

Read the sensor hub version.

0xAB 0x00 0x0A1 0x019 0x00

No error. Version is 10.19.0

0xAA 0x42 0x03†

Get the MAX30101 register attributes.

0xAB 0x00 0x01 0x24

No error. Attributes are 1 byte, 0x24

registers available.

0xAA 0x43 0x03

Read all the MAX30101 registers.

0xAB 0x00 0x00 0x00 0x01 0x00 0x02 0x00 … 0xFF 0x15

No error. Reg 0x00 = 0, Reg 0x01 = 0, Reg 0x02 = 0, …, Reg 0xFF = 0x15

0xAA 0x41 0x03 0x07†

Read the MAX30101 register 7.

0xAB 0x00 0x60

No error. Register 7 is 0x60.

0xAA 0x10 0x00 0x03†*

Set output mode to sensorraw and algorithm data.

0xAB 0x00

No error.

0xAA 0x10 0x01 0x0F*

Set FIFO threshold as almost

fullto at 0x0F. Increase or

decrease this value if you want more or fewer samples per interrupt.

0xAB 0x00

No error.

0xAA 0x52 0x00 0x01†

Enable AGC algorithm.

0xAB 0x00

No error.

0xAA 0x44 0x03 0x01*

Enable the MAX30101 sensor.

0xAB 0x00

No error.

0xAA 0x44 0x04 0x01

0x00†

Enable the sensor hub accelerometer. (Only enable if the board has an accelerometer.)

0xAB 0x00

No error. 0xAA 0x52 0x02 0x01*

Enable WHRM/MaximFast 10.x algorithm mode 1.

0xAB 0x00

No error. 0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x0F

No error. 0x0F samples are in the FIFO.

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0x6A 0x43 0x03 0x04 0x92 0x00 0x00 0x00 0x00 0x2E 0x15 0xFC

0xD8 0x00 0x04 0x02 0x3ex

0x02 0x76 0x63 0x03 0xE4 0x03, data for fourteen other samples

No error. IR counts = 223811, Red counts = 19778, LED3 = 0, LED4 = 11797, X accelerometer = -0.808, Y

accelerometer = 0.004, Z accelerometer = 0.574, Heart Rate =

63.0, Confidence = 99, SpO2 = 99.6, MaximFast State Machine Status = 3, data for fourteen other samples.

0xAA 0x40 0x03 0x0D 0x32

Set the MAX30101 register 0xD (LED2, pulse amplitude) to 0x32.

0xAB 0x00

No error.

0xAA 0x40 0x03 0x0C 0x32

Set the MAX30101 register 0x0C (LED1, pulse amplitude) to 0x32.

0xAB 0x00

No error.

0xAA 0x40 0x03 0x0A 0x23

Set the MAX30101 register 0x0A (ADC Range, Sample Rate, Pulse Width) to 0x23.

0xAB 0x00

No error.

0xAA 0x40 0x03 0x08 0x2F

Set the MAX30101 register 0x08 (Sample Average, FIFO Full) to 0x2F.

0xAB 0x00

No error.

0xAA 0x00 0x00*

Read the Sensor Hub Status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set.

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HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x12 0x00*

Get the number of samples in FIFO.

0xAB 0x00 0x0F

No error. Fifteen samples available.

0xAA 0x12 0x01*

Read the data stored in FIFO.

0xAB 0x00 0x03 0x6A 0x43 0x03 0x04 0x92 0x00 0x00 0x00 0x00 0x2E 0x15 0xFC

0xE2 0x00 0x07 0x02 0x36

0x02 0x76 0x63 0x03 0xE4 0x03, data for fourteen other samples

No error. IR counts = 223811, Red counts = 19778, LED3 = 0, LED4 = 11797, X accelerometer = -0.798, Y

accelerometer = 0.007, Z accelerometer = 0.566, Heart Rate =

63.0, Confidence = 99, SpO2 = 99.6, MaximFast State Machine Status = 3, data for fourteen other samples.

0xAA 0x00 0x00*

Read the Sensor Hub Status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set.

0xAA 0x12 0x00*

Get the number of samples in FIFO.

0xAB 0x00 0x0F

No error. Fifteen samples available. 0xAA 0x12 0x01*

Read the data stored in FIFO.

0xAB 0x00 …

No error. Data read.

*Mandatory †Recommended

Table 110 shows a capture of the I2C traffic between the example host microcontroller (MAX32630FTHR) and the MAX32664GWEB for commanding the MAX32664GWEB to stream sensorraw and algorithm data. The MAXREFDES101# is used for this example.

Table 110. MAX32664GWEB I2C Annotated Application Mode Example

HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x52 0x00 0x01†

Enable AGC.

0xAB 0x00 0x00

No error.

0xAA 0x10 0x00 0x03*

Set output mode to sensorraw and algorithm data.

0xAB 0x00

No error.

0xAA 0x10 0x01 0x05*

Set FIFO threshold as almost full

atto 0x05. Increase or decrease

this value if you want more or less frequent samples.

0xAB 0x00

No error.

0xAA 0x44 0x00 0x01*

Enable the MAX86140/MAX86141 sensor.

0xAB 0x00

No error.

0xAA 0x44 0x04 0x01*†

Enable the sensor hub accelerometer. (Only enable if

the board has an accelerometer.)

0xAB 0x00

No error.

0xAA 0x52 0x02 0x01*

Enable WHRM/MaximFast 1.0 algorithm.

0xAB 0x00

No error.

0xAA 0x42 0x00†

Get the MAX86140/MAX86141 register attributes.

0xAB 0x00 0x01 0x2B

No error. Attributes are 1 byte, 0x2B

registers available.

0xAA 0x43 0x00

Read all the MAX86140/MAX86141 registers.

0xAB 0x00 0x00 0x00 0x01 0x00 0x02 0x86 … 0x42 0x00

No error. Reg 0x00 = 0, Reg 0x01 = 0, Reg 0x02 = 0x86, …, Reg 0x42 = 0

0xAA 0x40 0x00 0x011

0x3F†

Set the MAX86140/MAX86141 register 0x11 to 0x3F (PPG2_ADC_RGE = 32768, PPG1_ADC_RGE = 32768, PPG_TINT = 117.3).

0xAB 0x00

No error.

0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x08

No error. Eight samples are in the FIFO.

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HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0X92 0x03 0x00 0x00 0x00 0x00 0x00 0x00 0x05 0x1C 0x29 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x96 0x0B 0x83 0xFC 0x37 0x02 0x92 0x63 0x00 0x00 0x00 data for seven other samples

No error. LED1 (Photo DDiode1) counts = 235891, LED2 PD1= 0, LED3

PD1= 0, LED14 PD2(Photo Diode2)

counts = 338247, LED2 PD25 = 0, LED

3 PD26 = 0, X accelerometer = 0.15,

Y accelerometer = 2.947, Z accelerometer = -0.969, Heart Rate =

65.8, Confidence = 99, SpO2 = 0, WHRM State Machine Status = 0, data for seven other samples.

0xAA 0x00 0x00*

Read the Sensor Hub Status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set.

0xAA 0x12 0x00*

Get the number of samples in FIFO.

0xAB 0x00 0x08

No error. Eight samples available.

0xAA 0x12 0x01*

Read the data stored in FIFO.

0xAB 0x00 0x03 0X99 0x73 0x00 0x00 0x00 0x00 0x00 0x00 0x05 0X29 0x47 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x97 0x0B 0xB3 0xFC 0x36 0x02 0x8F 0x63 0x00 0x00 0x00 data for seven other samples

No error. LED1 (Photo DDiode1) counts = 235891, LED2 PD1 = 0, LED3

PD1 = 0, LED14 PD2(Photo Diode2)

counts = 338247, LED52 PD2 = 0, LED36 PD2 = 0, X accelerometer =

0.151, Y accelerometer = 2.947, Z accelerometer = -0.97, Heart Rate =

65.5, Confidence = 99, SpO2 = 0, WHRM State Machine Status = 0, data for seven other samples.

0xAA 0x00 0x00*

Read the Sensor Hub Status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set.

0xAA 0x12 0x00*

Get the number of samples in FIFO.

0xAB 0x00 0x08

No error. Eight samples available. 0xAA 0x12 0x01*

Read the data stored in FIFO.

0xAB 0x00 …

No error. Data read.

*Mandatory †Recommended

Table 12 shows a capture of the I2C traffic between the example host microcontroller (MAX32630FTHR) and the MAX32664GWEC for commanding the MAX32664GWEC to stream sensor and algorithm data. The SpO2 LED board is used for this example.

Table 12. MAX32664GWEC I2C Annotated Application Mode Example

HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x10 0x00 0x03†

Set output mode to sensor and algorithm data.

0xAB 0x00

No error.

0xAA 0x10 0x01 0x05*

Set FIFO threshold to 0x05. Increase or decrease this value if you want more or less frequent samples.

0xAB 0x00

No error.

0xAA 0x44 0x00 0x01*

Enable the MAX86140/MAX86141 sensor.

0xAB 0x00

No error.

0xAA 0x44 0x04 0x01*

Enable the sensor hub accelerometer.

0xAB 0x00

No error.

0xAA 0x52 0x05 0x02*

Configure WSpO2 algorithm to continuous.

0xAB 0x00

No error. 0xAA 0x52 0x05 0x01*

Enable WSpO2 algorithm.

0xAB 0x00

No error.

0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x08

No error. Eight samples are in the FIFO.

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HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x00 0X00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x02 0x50 0xA6 0x02 0xCA 0x71 0x00 0x00 0x00 0xFC 0xD8 0x00 0x04 0x02 0X3E 0x00 0x29 0x02 0XB0 0x63 0x03 0xDE 0x00 0x00 0x00, 0x00 data for seven other samples

No error. Seq1Data= 0, Seq2Data = 0, Seq3Data = 0, Seq4Data Red LED = 151718, Seq5Data IR LED = 182897, Seq6Data = 0, X accelerometer = -

0.808, Y accelerometer = 0.004, Z accelerometer = 0.574, r = 4.1, Heart Rate = 68.8, Confidence = 99, SpO2 = 99.0, Progress = 0, Low SNR = 0, Motion = 0, SpO2 State = 2, data for seven other samples.

0xAA 0x00 0x00*

Read the Sensor Hub Status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set.

0xAA 0x12 0x00*

Get the number of samples in FIFO.

0xAB 0x00 0x08

No error. Eight samples available.

0xAA 0x12 0x01*

Read the data stored in FIFO.

0xAB 0x00 0x00 0X00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x02 0x52 0XF8 0x02 0xCB 0x83 0x00 0x00 0x00 0xFC 0xE5 0x00 0x07 0x02 0X26 0x00 0x29 0x02 0XB0 0x63 0x03 0xDE 0x00 0x00 0x00, 0x00 data for seven other samples

No error. Seq1Data= 0, Seq2Data = 0, Seq3Data = 0, Seq4Data Red LED = 152312, Seq5Data IR LED = 183171, Seq6Data = 0, X accelerometer = -

0.795, Y accelerometer = 0.007, Z accelerometer = 0.55, r = 4.1, Heart Rate = 68.8, Confidence = 99, SpO2 = 99.0, Progress = 0, Low SNR = 0, Motion = 0, SpO2 State = 2, data for seven other samples.

0xAA 0x00 0x00*

Read the Sensor Hub Status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set.

0xAA 0x12 0x00*

Get the number of samples in FIFO.

0xAB 0x00 0x08

No error. Eight samples available. 0xAA 0x12 0x01*

Read the data stored in FIFO.

0xAB 0x00 …

No error. Data read.

*Mandatory †Recommended

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Table 13 shows a capture of the I2C traffic between the example host microcontroller (MAX32630FTHR) and the MAX32664GWED for commanding the MAX32664GWED to stream sensor and algorithm data. The MAXREFDES220# is used for this example.

Table 13. MAX32664GWED I2C Annotated Application Mode Example

HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

Host sends commands to configure BPT user profile and then sends commands to start the user calibration while user finger is on the sensor.

0xAA 0x50 0x04 0x01 0x79 0x77 0x7A*

Configure BPT algorithm user profile for cuff readings of diastolic 121, 119, 122

0xAB 0x00

No error. 0xAA 0x50 0x04 0x02 0x51 0x4F 0x52*

Configure BPT algorithm cuff readings to diastolic 81, 79, 82

0xAB 0x00

No error.

0xAA 0x50 0x04 0x05 0x00†

Configure BPT algorithm to user is resting.

0xAB 0x00

No error.

0xAA 0x50 0x04 0x00 0x00†

Configure BPT algorithm to user is not using BP medication.

0xAB 0x00

No error.

0xAA 0x10 0x00 0x03†

Set output mode to sensor and algorithm data.

0xAB 0x00

No error.

0xAA 0x10 0x01 0x0F*

Set FIFO threshold to 0x0F. Increase or decrease this value if you want more or less frequent samples.

0xAB 0x00

No error.

0xAA 0x44 0x03 0x01*

Enable the MAX30101 sensor.

0xAB 0x00

No error.

0xAA 0x52 0x04 0x01*

Enable BPT algorithm calibration mode.

0xAB 0x00

No error. 0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x11

No error. Seventeen samples are in the FIFO.

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0x25 0xF4 0x02 0x6E 0x22 0x00 0x00 0x00 0x00 0x00 0x2C 0x04 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 data for sixteen other samples

No error. LED1 IR = 206324, LED2 = 159266, LED3 = N/A, LED4 = N/A, Status = 4, Progress = 0, Heart Rate =

0.0, Systolic = 0, Diastolic = 0, SpO2 = 0, r = 0, HRaboveResting = 0, data for sixteen other samples. … 0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x11

No error. Seventeen samples are in the FIFO.

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0xC4 0x39 0x02 0xD5 0xF1 0x00 0x00 0x00 0x00 0x0F 0x39 0x02 0x64 0x02 0x76 0x00 0x00 0x00 0x00 0x00 0x00 0x00 data for sixteen other samples

No error. LED1 IR = 206324, LED2 = 159266, LED3 = N/A, LED4 = N/A, Status = 2, Progress = 100%, Heart Rate = 63.0, Systolic = 0, Diastolic = 0, SpO2 = 0, r = 0, HRaboveResting = 0, data for sixteen other samples. Host sends commands to BPT algorithm to make an read the estimated BP while the user has finger on the sensor.

0xAA 0x10 0x00 0x03†

Set output mode to sensor and algorithm data.

0xAB 0x00

No error.

0xAA 0x10 0x01 0x0F*

Set FIFO threshold to 0x0F. Increase or decrease this value if you want more or less frequent samples.

0xAB 0x00

No error.

0xAA 0x52 0x00 0x01†

Enable AGC.

0xAB 0x00 0x00

No error.

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HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664 RESPONSE

RESPONSE

DESCRIPTION

0xAA 0x44 0x03 0x01*

Enable the MAX30101 sensor.

0xAB 0x00

No error.

0xAA 0x52 0x04 0x02*

Enable BPT algorithm estimation mode.

0xAB 0x00

No error. 0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x11

No error. Seventeen samples are in the FIFO.

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0x25 0xF4 0x02 0xD5 0xF1 0x00 0x00 0x00 0x00 0x00 0x2C 0x04 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 data for sixteen other samples

No error. LED1 IR = 246841, LED2 = 185841, LED3 = N/A, LED4 = N/A, Status = 4, Progress = 0, Heart Rate =

0.0, Systolic = 0, Diastolic = 0, SpO2 = 0, r = 0, HRaboveResting = 0, data for sixteen other samples. …

0xAA 0x00 0x00*

Read the sensor hub status.

0xAB 0x00 0x08

No error. DataRdyInt bit is set

0xAA 0x12 0x00*

Get the number of samples in the FIFO.

0xAB 0x00 0x0F

No error. Fifteen samples are in the FIFO.

0xAA 0x12 0x01*

Read the data stored in the FIFO.

0xAB 0x00 0x03 0x9E 0x32 0x02 0xF5 0x6c 0x00 0x00 0x00 0x00 0x1B 0XD2 0x02 0x64 0x02 0XA8 0x77 0x4A 0x03 0xE8 0x00 0x00 0x00 data for fourteen other samples

No error. LED1 IR = 206324, LED2 = 159266, LED3 = N/A, LED4 = N/A, Status = 2, Progress = 100%, Heart Rate = 68.0, Systolic = 119, Diastolic = 74, SpO2 = 100.0, r = 0, HRaboveResting = 0, data for fourteen other samples.

Host reads user profile and calibration data

0xAA 0x51 0x04 0x03†

Read the 824 bytes of calibration data for this user.

0xAB 0x00 0x2E 0xE8 0x02 0x00 0x88 0x39 0x02 0x00 0x79 0x00 eight hundred fourteen more bytes of calibration data

No error. 824 bytes of user profile and calibration data.

Host writes user profile and calibration data

0xAA 0x50 0x04 0x03 0x2E 0xE8 0x02 0x00 0x88 0x39 0x02 0x00 0x79 0x00 eight hundred fourteen more bytes of calibration data †

0xAB 0x00

No error.

*Mandatory †Recommended

I2C Commands to Flash the Application Algorithm/Firmware

The MAX32664 is pre-programmed with bootloader firmware which accepts in-application programming of the Maxim supplied application algorithm/firmware file (.msbl). Table 121 is a capture of the I2C commands that are necessary to flash the application algorithm/firmware to the MAX32664.

IMPORTANT: Do not enable the accelerometer if your board does not have the accelerometer.

This example was captured with the MAX32630FTHR acting as the host microcontroller. The MAX32664 uses the 8-bit slave address of 0xAA. The example encrypted algorithm file used was the MAX32660_SmartSensor_OS24_MaximFast_1.8.2a.msbl (26 pages, 8196 bytes for the page size). Each

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page sent includes 16 CRC bytes for that page, so there are 8208 bytes per page sent in the payload of the message. The number of pages is located at address 0x44 in the .msbl file.

Table 141. Annotated I2C Trace for Flashing the Application

HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664

RESPONSE

DESCRIPTION

Sequence the MAX32664 to enter bootloader mode. *

Figure 7. Sequence to enter bootloader mode.

0xAA 0x01 0x00 0x08*

Set mode to 0x08 for bootloader mode.

0xAB 0x00

No error.

0xAA 0x02 0x00

Read mode.

0xAB 0x00 0x08

No error. Mode is bootloader.

0xAA 0xFF 0x00+

Get ID and MCU type.

0xAB 0x00 0x01

No error. MCU is MAX32660/MAX32664.

0xAA 0x81 0x00

Read bootloader firmware version.

0xAB 0x00 0x03 0x00 0x00

No error. Version is 3.0.0.

0xAA 0x81 0x01

Read bootloader page size.

0xAB 0x00 0x20 0x00

No error. Page size is 8192.

0xAA 0x80 0x02 0x00 0x1A*

Bootloader flash. Set the “number of pages” to 31 based on the value at byte 0x44 from the application .msbl file, which is created from the user application .bin file.

0xAB 0x00

No error.

Figure 8. Page number byte 0x44 from the .msbl file.

0xAA 0x80 0x00 0x1A 0xDB 0xE5 0x0D 0x90 0x79 0xE6 0xC6 0x13 0x87 0xB9*

Bootloader flash. Set the initialization vector bytes 0x28 to 0x32 from the .msbl file.

0xAB 0x00

No error.

Figure 9. Initialization vector bytes 0x28 to 0x32 from the .msbl file.

0xAA 0x80 0x01 0x2B 0xF5 0xAD 0xCD 0x2E 0x47 0xD2 0x83 0x23 0x88 0x37 0x62 0x02 0xED 0x27 0xAF*

Bootloader flash. Set the authentication bytes 0x34 to 0x43 of the .msbl file.

0xAB 0x00

No error.

Figure 10. Authentication bytes 0x34 to 0x43 from the .msbl file.

0xAA 0x80 0x03*

Bootloader flash. Erase application.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xC2 0x31 0x90 ... 0x9E 0x6A 0x0E*

Bootloader flash. Send page bytes 0x4C to 0x205B from the .msbl file.

0xAB 0x00

No error.

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HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664

RESPONSE

DESCRIPTION

Figure 11. Send page bytes 0x4C to 0x205B from the .msbl file.

0xAA 0x80 0x04 0xCC 0xC5 0x68 ... 0xF7 0xD6 0x4C*

Bootloader flash. Send page bytes 0x205C to 0x406B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x2E 0xA6 0x13 ... 0x84 0xF7 0xCF*

Bootloader flash. Send page bytes 0x406C to 0x607B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xD7 0x1F 0x7F ... 0x55 0xAB 0xB8*

Bootloader flash. Send page bytes 0x607C to 0x808B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xC4 0x63 0x2B ... 0x48 0xCD 0x52*

Bootloader flash. Send page bytes 0x808C to 0xA09B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x89 0x33 0x22 ... 0x31 0xAD 0x19*

Bootloader flash. Send page bytes 0xA09C to 0xC0AB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x8B 0x97 0x18 ... 0xF3 0xCF 0x90*

Bootloader flash. Send page bytes 0xC0AC to 0xE0BB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xD0 0x78 0x38 ... 0x1F 0x7F 0x92*

Bootloader flash. Send page bytes 0xE0BC to 0x100CB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xB1 0xE9 0x8F ... 0xF4 0x23 0xD8*

Bootloader flash. Send page bytes 0x100CC to 0x120DB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xF8 0xC6 0x83 ... 0xF4 0x24 0xE2*

Bootloader flash. Send page bytes 0x120DC to 0x140EB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x1F 0x4F 0x5C ... 0xCC 0x2E 0xCD*

Bootloader flash. Send page bytes 0x140EC to 0x160FB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x40 0x1F 0x03 ... 0x26 0xEB 0xB9*

Bootloader flash. Send page bytes 0x160FC to 0x1810B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x2F 0xD9 0xB2 ... 0xEE 0x2A 0x8F*

Bootloader flash. Send page bytes 0x1810C to 0x1A11B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x51 0x32 0x47 ... 0x41 0xE6 0x47*

Bootloader flash. Send page bytes 0x1A11C to 0x1C12B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x22 0xA6 0x06 ... 0x2A 0xCB 0x44*

Bootloader flash. Send page bytes 0x1C12C to 0x1E13B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x68 0x9E 0x1E ... 0x53 0x89 0xE8*

Bootloader flash. Send page bytes 0x1E13C to 0x2014B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x5F 0x1A 0x6A ... 0x14 0xA1 0x85*

Bootloader flash. Send page bytes 0x2014C to 0x2215B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xE8 0xDE 0xC9 ... 0x81 0xD8 0x00*

Bootloader flash. Send page bytes 0x2215C to 0x2416B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x0E 0xD2 0x16 ... 0x8D 0x69 0xEE*

Bootloader flash. Send page bytes 0x2416C to 0x2617B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x2F 0x4B 0x38 ... 0x02 0xA7 0xDC*

Bootloader flash. Send page bytes 0x2617C to 0x2818B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xA5 0xFE 0xFD ... 0xE3 0x38 0x89*

Bootloader flash. Send page bytes 0x2818C to 0x2A19B from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x52 0x88 0x9A ... 0xF0 0xC5 0x9D*

Bootloader flash. Send page bytes 0x2A19C to 0x2C1AB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xA3 0xA6 0x92 ... 0xA0 0x4D 0xBE*

Bootloader flash. Send page bytes 0x2C1AC to 0x2E1BB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x47 0x09 0x75 ... 0x24 0xBD 0x3D*

Bootloader flash. Send page bytes 0x2E1BC to 0x301CB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0x44 0xEC 0xE6 ... 0xBC 0xC9 0x5E*

Bootloader flash. Send page bytes 0x301CC to 0x321DB from the .msbl file.

0xAB 0x00

No error.

0xAA 0x80 0x04 0xD3 0x58 0x34 ... 0x62 0x00 0x37*

Bootloader flash. Send page bytes 0x321DC to 0x341EB from the .msbl file.

0xAB 0x00

No error. Sequence the MAX32664 to enter application mode. *

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HOST COMMAND

COMMAND DESCRIPTION

READ MAX32664

RESPONSE

DESCRIPTION

Figure 12. Sequence to enter application mode.

0xAA 0x02 0x00+

Read mode.

0xAB 0x00 0x00

No errors. Mode is application.

0xAA 0xFF 0x00

Get ID and MCU type.

0xAB 0x00 0x01

No error. MCU is MAX32660/MAX32664

0xAA 0xFF 0x03

Get Sensor Hub version.

0xAB 0x00 0x01 0x08 0x02

No error. Version is 1.8.2.

0xAA 0x42 0x03+

Get the MAX30101 AFE register attributes.

0xAB 0x00 0x01 0x24

No error. Attributes are 1

byte, 0x24 registers available.

0xAA 0x43 0x03

Read all the MAX30101 registers.

0xAB 0x00 0x00 0x00 0x01 0x00 0x02 0x40…

No error. Reg 0x00=0, reg 0x01=0, reg0x02=0x40, … Returns the Read Status Byte and 36 pairs of numbers.

0xAA 0x41 0x03 0x07

Read the MAX30101 register 7.

0xAB 0x00 0x00

No error. Register 0x07 is 0.

*Mandatory +Recommended

It is recommended to program the latest version of the MAX32664 sensor hub application algorithm/firmware .msbl file into the MAX32664 chip. Check the version that is programmed into the chip by using the command “Identity, Read sensor hub version.” The latest sensor hub algorithm/firmware is available for download for the MAX32664, MAXREFDES220#, and MAXREFDES101# from the Maxim website.

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In-Application Programming of the MAX32664

The MAX32664 allows for in-application programming of the application algorithm/firmware. In-application programming allows for the programming of the sensor hub application firmware during

manufacturing and for allowing over-the-air (OTA) updates of the application firmware in the product. Figure 13 is a flowchart of the in-application programming.

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Note: 340ms may need to be adjusted to 680ms or more when the reference design host is communicating with slower PCs/systems.

Figure 13. MAX32664 in-application programming flowchart.

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MAX32664 APIs and Methods for Reset, Sleep, Status, Heartbeat

Table 125 summarizes the commands and methods to place the MAX32664 into reset or sleep, to interrogate its status, or to generate the “heartbeat” (a periodic signal generated by the software to indicate normal operation).

Table 15. Table 12. MAX32664 I2C Message Protocol Definitions

COMMAND NAME

HOST COMMAND TO MAX32664

DESCRIPTION

MAX32664 Soft Reset

0xAA 0x01 0x00 0x02

Puts MAX32664 into reset.

MAX30101 AFE Soft Reset by Write Register to AFE

0xAA 0x40 0x03 0x09 0x40

Write 0x40 to MAX30101 register 0x09 to issue a soft reset to the MAX30101. The AFE must be enabled using the enable command.

MAX32664 Sleep

0xAA 0x01 0x00 0x01

To be implemented in the future.

MAX32664 Sleep between Interrupts

To be implemented in the future.

MAX30101 AFE Sleep, Use Write Reg to AFE

0xAA 0x40 0x03 0x09 0x80

Write 0x80 to MAX30101 register 0x09 to put the MAX30101 into shutdown mode. The AFE must be enabled using the enable command.

MAX32664 Hard Reset

Use MFIO and RSTN pins according to Figure

4Figure 4 and Figure 5Figure 5.

WDT in MAX32664 Bootloader Mode

Not implemented.

WDT in MAX32664 .msbl Application mode

Not implemented.

Bootloader or Application Status

0XAA 0x02 0x00

Send the read mode command. Response is 0xAB 0x00 0x08 if in bootloader mode or 0xAB 0x00 0x00 if in application mode.

Heartbeat for Application Mode

Sample source and .msbl file to toggle P0.9 is provided.

Default Application .msbl Versions Pre-Programmed on the MAX32664GWEA/B/C/D

The MAX32664GWEA/B/C/D are pre-programmed with the bootloader and the application .msbl application/sensor hub version listed in Table 16. The pre-programmed application .msbl versions are not updated by Maxim. The pre-programmed parts may not be programmed with the latest version of the .msbl application; It is recommended that application be updated to the latest .msbl which are available on the Maxim Integrated website.

Table 16. MAX32664GWEA/B/C/D Pre-Programmed .msbl Version

MAX32664GWEA

MAX32664GWEB

MAX32664GWEC

MAX32664GWED

Pre-Programmed . msbl

application/sensor hub

version

Pre-programmed .msbl

version 1.9.1

Pre-programmed

.msbl version 20.1.2

Pre-programmed

.msbl version 30.2.2

Pre-programmed

.msbl version 40.2.2

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Revision History

REVISION

NUMBER

REVISION

DATE

DESCRIPTION

PAGES CHANGED

01/19

Initial release

—

05/18

Add MAX32664B/C/D application firmware description. Add additional GPIOs for MAXREFDES101. Add 0x11 to the commands. Change 0x14 0x04 to 0x14 0x00. Updated 0x44 0x04 command and Sequence of Commands for external host. Add PD1, PD2 to 0x51/0 0x05 0x09. Add additional modes to 0x52 0x02

and 0x52 0x04. Label commands in message protocol table and output format

table as MAX32664A/B/C/D. Add mode 2 for MaximFast in output format table. Sequence of Commands table updated. Add annotated I2C traces for MAX32664GWEC, MAX32664GWED. Corrected timing for CMD_DELAY, and time for application to respond to I2C commands.

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©2019 by Maxim Integrated Products, Inc. All rights reserved. Information in this publication concerning the devices, applications, or technology described is intended to suggest possible uses and may be superseded. MAXIM INTEGRATED PRODUCTS, INC. DOES NOT ASSUME LIABILITY FOR OR PROVIDE A REPRESENTATION OF ACCURACY OF THE INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED IN THIS DOCUMENT. MAXIM ALSO DOES NOT ASSUME LIABILITY FOR INTELLECTUAL PROPERTY INFRINGEMENT RELATED IN ANY MANNER TO USE OF INFORMATION, DEVICES, OR TECHNOLOGY DESCRIBED HEREIN OR OTHERWISE. The information contained within this document has been verified according to the general principles of electrical and mechanical engineering or registered trademarks of Maxim Integrated Product

Maxim Integrated MAX32664 User Manual

Specifications and Main Features

Frequently Asked Questions

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