ADCMXL3021 datasheet(44/50 Pages) AD

44 / 50 page

ADcmXL3021

Data Sheet

Rev. A | Page 44 of 50

TIME_STAMP_L AND TIME_STAMP_H, DATA

RECORD TIMESTAMP

The TIME_STAMP_L (see Table 104 and Table 105) and

TIME_STAMP_H (see Table 106 and Table 107) registers contain a

relative timestamp for the most recent data capture event.

Table 104. TIME_STAMP_L Register Definition

Addresses

Default

Access

Flash Backup

0x4C, 0x4D

0x0000

Not applicable

Table 105. TIME_STAMP_L Bit Descriptions

Bits

Description

[15:0]

Timestamp, seconds, lower word

Table 106. TIME_STAMP_H Register Definition

Addresses

Default

Access

Flash Backup

0x4E, 0x4F

0x0000

Not applicable

Table 107. TIME_STAMP_H Bit Descriptions

Bits

Description

[15:0]

Timestamp, seconds, upper word

DAY_REV, DAY AND REVISION

The DAY_REV (see Table 108 and Table 109) contains part of the

factory programming date (day) and the revision of the firmware.

Table 108. DAY_REV Register Definition

Addresses

Default

Access

Flash Backup

0x52, 0x53

Not applicable

Table 109. DAY_REV Bit Descriptions

Bits

Description

[15:12]

Day of the month, most significant digit

[11:8]

Day of the month, least significant digit

[7:4]

Firmware revision, most significant digit

[3:0]

Firmware revision, least significant digit

YEAR_MON, YEAR AND MONTH

The YEAR_MON (see Table 110 and Table 111) contains the

factory programming date (month and year).

Table 110. YEAR_MON Register Definition

Addresses

Default

Access

Flash Backup

0x54, 0x55

Not applicable

Table 111. YEAR_MON Bit Descriptions

Bits

Description

[15:12]

Year, most significant digit

[11:8]

Year, least significant digit

[7:4]

Month of the year, most significant digit

[3:0]

Month of the year, least significant digit

PROD_ID, PRODUCT IDENTIFICATION

The PROD_ID (see Table 112 and Table 113) register contains the

numerical portion of the model number.

Table 112. PROD_ID Register Definition

Addresses

Default

Access

Flash Backup

0x56, 0x57

0x0BCD

Not applicable

Table 113. PROD_ID Bit Descriptions

Bits

Description

[15:0]

Binary representation of the numerical portion of the

model number: 0x0BCD = 3,021

SERIAL_NUM, SERIAL NUMBER

The SERIAL_NUM (see Table 114 and Table 115) contains the

serial number of the unit, within a particular manufacturing lot.

Table 114. SERIAL_NUM Register Definition

Addresses

Default

Access

Flash Backup

0x58, 0x59

Not applicable

Table 115. SERIAL_NUM Bit Descriptions

Bits

Description

[15:0]

Lot specific serial number

USER_SCRATCH

The USER_SCRATCH register allows end users to store a device

number to identify the sensor. The register is readable and

writable. The last written value is nonvolatile, which allows data

recovery upon reset.

Table 116. USER_SCRATCH Register Definition

Addresses

Default

Access

Flash Backup

0x5A, 0x5B

Not applicable

R/W

Yes

Table 117. USER_SCRATCH Bit Descriptions

Bits

Description

[15:0]

Optional user ID

REC_FLASH_CNT, RECORD FLASH ENDURANCE

The REC_FLASH_CNT (see Table 118 and Table 119) provides a

tool for tracking the endurance of the flash memory bank, which

support the 10 record storage locations. The value in the

REC_FLASH_CNT register increments after clearing the user

record (GLOB_CMD) and each time the record storage fills up

(tenth location contains event data)

Table 118. REC_FLASH_CNT Register Definition

Addresses

Default

Access

Flash Backup

0x5C, 0x5D

Not applicable

Table 119. REC_FLASH_CNT Bit Descriptions

Bits

Description

[15:0]

Endurance counter for the record flash memory

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