MAS6503 datasheet(12/34 Pages) MAS

12 / 34 page

DA6503.005

14 December 2016

12 (34)

MAS6503 includes a 32 bytes (256 bits) EEPROM

data memory and twelve registers. Two bytes (16

bits) of EEPROM are reserved for internal 500 kHz

oscillator frequency trim and programmable I2C

device address data but the remaining 30 bytes

(240 bits) are free for storing sensor calibration and

other data. See table 1 on the previous page for

In the SPI serial bus the address bit A7 selects

between write (A7=0) and read (A7=1) operation. In

the I2C serial bus A7 is always high (A7=1) and

selection between write and read operation is done

with the LSB bit of the I2C device address. See

table 9 in chapter SERIAL DATA INTERFACE

CONTROL. The MAS6503 has both hard wired and

programmable

I2C

device

addresses.

The

programmable

device

address

factory

programmed to value EA HEX (%11101010) which is

the same as the hard wired device address of

MAS6503. When unique device address is needed

it can be programmed to the Programmable I2C

Device

Address

(DEHEX/5EHEX).

The

MAS6503 will respond to both hard wired and

programmed I2C device addresses.

MAS6503

has

one

trim

Oscillator

frequency control register (E4/64HEX). This is

marked with “R+T” in table 1. In the EEPROM there

is specific Oscillator frequency trim data address

(DF/5FHEX) reserved for permanent storage of the

trim value. This is marked with “E+T” in table 1. The

internal 500 kHz oscillator frequency trim value is

automatically read from EEPROM in the beginning

of each conversion when this feature is enabled in

the Test register (E1/61HEX). When disabled it is

possible to test different trim data in the trim

registers before trimming value is found and stored

into the EEPROM. Note that Oscillator frequency

trim value has been factory calibrated and stored

into the EEPROM.

Reset register (E0/60HEX) does not contain any

data. Any dummy data written to this register forces

a reset. A reset initializes all control registers

(addresses E1HEX…EBHEX) to a zero value.

Test register (E1/61HEX) is mainly used for testing

and trimming purposes. It defines whether the

internal oscillator frequency trim data is taken from

the EEPROM (default setting) or from the registers.

However if an external clock signal is used the test

signal. See the Test register description for details.

There are two Measurement control registers, first

(E2/62HEX) and second (E3/63HEX) which are used

for configuring and starting an A/D conversion.

The Oscillator frequency control register (E4/64HEX)

is used only during internal clock oscillator

trimming. During trimming there is searched

500 kHz oscillator frequency. However the internal

clock oscillator frequency is trimmed by MAS during

wafer level testing and the trimming value is stored

into the Oscillator frequency trim data EEPROM

address (DF/5FHEX). Thus there is no need to adjust

the factory stored clock oscillator trimming value. In

normal operation the trim value is automatically

read from the EEPROM memory in the beginning of

each conversion.

EEPROM write enable register (E6/66HEX) is used

for enabling EEPROM write (EWE bit = 1) since by

default the EEPROM is write protected (EWE bit =

0).

The

24-bit

A/D

conversion

result

(sensor,

temperature or VDD level) is stored into three

registers E8HEX (MSB, most significant byte), E9HEX

(ISB, intermediate significant byte), EAHEX (LSB,

least significant byte).

EEPROM status register (EA/6AHEX) reflects the

EEPROM error correction status. This register can

be used to verify that the EEPROM operation has

finished without errors.

Regulator output voltage control register (EB/6BHEX)

defines regulator output voltage when the internal

regulator is enabled.

MAS6503 数据表(PDF) 12 Page - Micro Analog systems

MAS6503 数据表(HTML) 12 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