ADIS16260/ADIS16265

Preliminary Technical Data

Rev. PrB | Page 12 of 19

PROGRAMMING AND CONTROL

CONTROL REGISTER OVERVIEW

The ADIS16260/ADIS16265 offer many programmable features

controlled by writing commands to the appropriate control

registers using the SPI. Table 8 provides a summary of these

control registers, which controls the operation of the following

parameters:



Calibration



Global commands



Operational control



Sample rate



Power management



Digital filtering



Dynamic range



DAC output



Digital I/O



Operational status and diagnostics



Self-test



Status conditions



Alarms

CONTROL REGISTER STRUCTURE

The ADIS16260/ADIS16265 uses a temporary, RAM-based

memory structure to facilitate the control registers displayed in

Table 8. The start-up configuration is stored in a flash memory

structure that automatically loads into the control registers

during the start-up sequence. Each nonvolatile register has a

corresponding flash memory location, for storing the latest

configuration contents. Since flash memory has endurance

limitations, the contents of each nonvolatile register must be

manually stored to flash (note that the contents of the control

register contents are only nonvolatile when they are stored to

flash). The manual flash update command, made available

in the COMMAND register, provides this function. The

ENDURANCE register provides a counter that allows for

memory reliability management against the 20,000-write cycle

specification.

Table 8. Control Register Memory Map

Register Name

Type

Volatility

Address

Bytes

Function

Reference Table

GYRO_OFF

R/W

Nonvolatile

0x15, 0x14

2

Gyroscope bias offset factor

Table 9, Table 10

GYRO_SCALE

R/W

Nonvolatile

0x17, 0x16

2

Gyroscope scale factor

Table 11, Table 12

0x18 to 0x1F

8

Reserved

ALM_MAG1

R/W

Nonvolatile

0x21, 0x20

2

Alarm 1 amplitude threshold and polarity

Table 31, Table 32

ALM_MAG2

R/W

Nonvolatile

0x23, 0x22

2

Alarm 2 amplitude threshold and polarity

Table 35, Table 36

ALM_SMPL1

R/W

Nonvolatile

0x25, 0x24

2

Alarm 1 sample period

Table 33, Table 34

ALM_SMPL2

R/W

Nonvolatile

0x27, 0x26

2

Alarm 2 sample period

Table 37, Table 38

ALM_CTRL

R/W

Nonvolatile

0x29, 0x28

2

Alarm control register

Table 39,

Table 40

0x2A to 0x2F

6

Reserved

AUX_DAC

R/W

Volatile

0x31, 0x30

2

Auxiliary DAC data

Table 21, Table 22

GPIO_CTRL

R/W

Volatile

0x33, 0x32

2

Auxiliary digital I/O control register

Table 23, Table 24

MSC_CTRL

R/W

0x35, 0x34

2

Miscellaneous control register

Table 26, Table 27

SMPL_PRD

R/W

Nonvolatile

0x37, 0x36

2

ADC sample period control

Table 15, Table 16

SENS/AVG

R/W

Nonvolatile

0x39, 0x38

2

Defines the dynamic range (sensitivity setting)

and the number of taps for the digital filter

Table 19, Table 20

SLP_CNT

R/W

Volatile

0x3B, 0x3A

2

Counter used to determine length of power-

down mode

Table 17, Table 18

STATUS

R

Volatile

0x3D, 0x3C

2

System status register

Table 28, Table 29

COMMAND

W

N/A

0x3F, 0x3E

2

System command register

Table 13, Table 14