SL900A datasheet(39/103 Pages) AMSCO

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ams Datasheet

Page 39

[v1-12] 2018-Oct-29

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SL900A − Custom Command Description

Start Log

The START LOG command starts the logging process. It

refreshes the data in the calibration registers, enables the RTC,

writes the Start time and sets the Active bit in the “System

status” field in the EEPROM.

Command Structure:

Successful Reply Structure:

The “Start Time” Field is Composed as:

The year for the 'Start Time' field assumes year 2000+ Year[5:0]

so 2017 would be 010001.

Get Log State

The GET LOG STATE command reads the status of the logging

process. The command can be used to quickly determine the

current state of the product, together with the Shelf life and the

Limit counter.

Command Structure:

Successful Reply Structure:

OPTIONAL - only when Shelf Life flag is set in the EEPROM.

SOF

Custom

Command Code

Start Time

Handle

CRC

Frame - sync

0xE0

0xA7

32 bits

16 bits

SOF

Header

Handle

CRC

EOF

Pilot tone + preamble

1 bit [0]

16 bits

Dummy bit [1]

Bit Number

31 … 26

25 … 22

21 … 17

16 … 12

11 … 6

5 … 0

Function

Year [5:0]

Month [3:0]

Day [4:0]

Hour [4:0]

Minute [5:0]

Second [5:0]

SOF

Custom

Command Code

Handle

CRC

Frame - sync

0xE0

0xA8

16 bits

SOF

Hea

der

Limit

Counter

System

Status

SL-bloc

k 0&1

Current

Shelf

Life

Status

Flags

Han

dle

CRC

EOF

Pilot tone

preamble

1 bit

[0]

bits

64 bits

(see Note)

24 bits

(see Note)

bits

Dum

bit [1]

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