MAS6503 datasheet(20/34 Pages) MAS

20 / 34 page

DA6503.005

14 December 2016

20 (34)

EEPROM WRITE PROCEDURE

This chapter gives instructions for writing data to

the EEPROM memory.

The MAS6503 24 bit Analog-to-Digital Converter

(ADC) has a 256 bit (32 bytes) EEPROM memory.

8 bits (1 byte) has been reserved for storing internal

clock oscillator trimming data and other 8 bits (1

byte) for the programmable I2C device address.

The remaining 240 bits (30 bytes) are free for

storing sensor calibration data and other use.

See figure 3 on previous page showing the

EEPROM write procedure.

Make sure in the beginning of the EEPROM write

procedure that the MAS6503 initial conditions are

met. Connecting VDD triggers power-on-reset

(POR) but to make sure the device is reset an

additional reset should be given using the XCLR pin

or writing any data on the reset register E0/60HEX via

the serial bus. The device reset will guarantee that

in the Test register (E1/61HEX) the ENDIV=0 and in

the Measurement control register 1 (E2/62HEX) the

DIV=0 are selected. These select 250 kHz system

clock

which

required

the

EEPROM

programming.

EEPROM write is enabled by writing value 04HEX to

the EEPROM write enable register (E6/66HEX). The

default register value after power on is 00HEX.

Next the data can be written to the EEPROM

memory one byte (8-bit) at a time. It is necessary to

have a delay of minimum 16ms after programming

each byte (8-bit). The success of each write can be

verified by reading back the data (8-bit) and

comparing it to the original byte (8-bit). Additionally

it is also possible to check the EEPROM status

EEPROM status register value should be 00HEX

when the read EEPROM data byte is free of errors.

After all data bytes are written the EEPROM

memory can be protected from write by writing

00HEX to the EEPROM write enable register

(E9/69HEX).

See table 1 showing the MAS6503 register and

EEPROM data addresses.

MAS6503 数据表(PDF) 20 Page - Micro Analog systems

MAS6503 数据表(HTML) 20 Page - Micro Analog systems

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

数据表下载