ADIS16203SLASHPCBZ datasheet(20/28 Pages) AD

20 / 28 page

ADIS16203

Rev. 0 | Page 20 of 28

STATUS FEEDBACK

The status control register within the ADIS16203 is utilized in deter-

mining the present state of the device. The ability to monitor the device

becomes necessary when and if the ADIS16203 has registered an alarm

and/or error condition as indicated by the alarm enable (Bit 14) within

the output data registers.

STATUS Register Definition

Address

Default1

Format

Access

0x3D, 0x3C

0x0000

N/A

Read only

1 Default is valid only until the first register write cycle.

The STATUS control register contains the alarm/error flags that

indicate abnormal operating conditions. See Table 19 for each bit’s

definition. Bit 0 and Bit 1 will automatically clear when the power

supply is in the specified range of operation. Setting Bit 4 in the

COMMAND register clears all flags. The flags are set on a continuing

basis as long as the error or alarm conditions persist.

Table 19. STATUS Bit Descriptions

Bit

Description

15:10

Not used

Alarm 2 Status

1: Active

0: Normal mode

Alarm 1 status

1: Active

0: Normal mode

Not used

Invalid Orientation

1: Invalid orientation

0: Normal mode

Self Test Fail

1: Self-test failure

0: Self-test pass

SPI Communications Failure

1: Error condition

0: Normal mode

Control Register Update Failed

1: Error condition

0: Normal mode.

Power Supply Above 3.625 V

1: Error condition

0: Normal mode

Power Supply Below 2.975 V

1: Error condition

0: Normal mode

COMMAND CONTROL

The COMMAND control register is utilized in sending global

commands to the ADIS16203 device. Any one of the global

commands can be implemented by simply writing 1 to its

corresponding bit location. The command control register has

write-only capability and is volatile. Table 20 describes each of

these global commands.

COMMAND Register Definition

Address

Default1

Format

Access

0x3F, 0x3E

0x0000

N/A

Write only

1 Default is valid only until the first register write cycle.

Table 20. COMMAND Bit Descriptions

Bit

Description

15:8

Not used.

Software Reset Command.

6:5

Not used.

Clear Status Register, once per activation

Manual Flash Update Command. This command is

utilized in updating all of the nonvolatile registers to

Flash. Once the command is initiated, the supply

voltage, VDD, must remain within specified limits for

50 ms to ensure proper update of the nonvolatile

registers to Flash.

Auxiliary DAC Latch Command. This command acts to

latch the AUX_DAC control register data into the

auxiliary DAC upon receipt of the command. This allows

for sequential loading of the upper and lower AUX_DAC

data bytes via the SPI without having the auxiliary DAC

transition into unwanted, intermediate states based

upon the individual AUX_DAC data bytes. Once the two

bytes of AUX_DAC are loaded, the DAC latch command

is initiated to move the data into the auxiliary DAC itself.

Factory Reset Command. This command allows the user

to reset the INCL_NULL register to its nominal setting

(0x0000) upon receipt of the command. Data within the

moving average filters is reset. As the manual Flash

command (COMMAND register, Bit 3), this command

stores all of the nonvolatile registers to Flash. Once the

command is initiated, the supply voltage, VDD, must

remain within specified limits for 50 ms to ensure

proper update of the nonvolatile registers to Flash.

Null Command. This command loads the inclination

offset register with a value that zeros out the inclination

and outputs. Useful as a single command to simulta-

neously zero the inclination outputs. As the manual

Flash command (COMMAND register, Bit 3), this command

stores all of the nonvolatile registers to Flash. Once the

command is initiated, the supply voltage, VDD, must

remain within specified limits for 50 ms to ensure

proper update of the nonvolatile registers to Flash.

ADIS16203/PCBZ датащи(PDF) 20 Page - Analog Devices

ADIS16203/PCBZ датащи(HTML) 20 Page - Analog Devices

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

датащи скачать

ссылки URL