MAS6510 datasheet(15/32 Pages) MAS

15 / 32 page

DA6510.009

6 September, 2018

15 (32)

CONVERSION RESULT REGISTERS

(EA…ECHEX)

After measuring capacitance, temperature or supply

voltage the 24-bit conversion result is stored into

three register addresses EA…ECHEX. The MSB

(most significant byte) is at EAHEX, ISB (intermediate

significant byte) at EBHEX and LSB (least significant

byte) at ECHEX.

EEPROM STATUS REGISTER (ED/6DHEX)

The EEPROM status register (ED/6DHEX) indicates if

the stored EEPROM byte is corrupted. The register

is updated after each EEPROM data byte read

command. See table 9 below. The ERROR bit tells

whether a data error has been detected or not. The

DED bit tells whether two or more bit errors have

been detected. The EEPROM can correct internally

only single bit errors i.e. when ERROR=1 and

DED=0. The read EEPROM data byte is corrupted if

ERROR=DED=1.

Table 9. MAS6510 EEPROM status register (ED/6DHEX). Only bits (7:6) are used.

Bit Number

Bit Name

Description

Value

Function

ERROR

EEPROM error detection

No errors

Error detected

DED

EEPROM double error detection

No errors

2 (or more) data errors

5-0

000000

TRIMMING CONTROL REGISTER (EE/6EHEX)

The Trimming control register (EE/6EHEX) is used to

select between different trimming operating modes.

See table 10 showing the functions of the Trimming

control register.

After a power-up reset, master reset via XCLR or a

software reset via serial bus the Trimming control

(00HEX). This is the normal operating mode for a

trimmed MAS6510

device. In

this

mode

the

capacitive front-end trim values to use (CS, CR and

Gain) are automatically read from the EEPROM

memory in the beginning of each conversion start.

When calibrating a sensor there is an operating

mode in which only the factory calibrated internal

oscillator (OSC) clock trim data is read from the

EEPROM memory. This mode is selected by writing

%10101010 (AAHEX) to the Trimming control register.

In this mode it is possible to run conversion tests for

different

front-end

trim

values

before

suitable values are found and programmed to the

EEPROM.

There is also a trimming mode in which all trim data

including the internal oscillator trim data is taken from

the trim registers rather than from the EEPROM. This

mode is selected by writing %11111111 (FFHEX) to

the Trimming control register.

Table 10. Trimming control Register (EE/6EHEX)

Bit Number

Bit Name

Description

Value

Function

7-0

REGEE<7:0>

EEPROM control bits

00000000

10101010

11111111

OTHER

All trim data from EEPROM

(normal operating mode)

Only OSC from EEPROM

All trim data from registers

All trim data from EEPROM

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