CC2431

CC2431 PRELIMINARY Datasheet (Rev. 1.01) SWRS034A

Page 11 of 13

Bit

Name

Reset

R/W

Description

7:5

-

00

R0

Reserved, read as 0.

4

EN

0

R/W

Enable location engine

0

Disable location engine

1

Enable location engine

3

DONE

0

R

Estimation completed. After 1 has been written to RUN, this

bit is cleared and then set to 1 when the estimated data is

ready.

2

PARLD

0

R/W

Load parameters. This bit shall be written as 1 before the

set of parameters are written to MEASPARM. Write 0 to this

bit after the last parameter has been written.

1

REFLD

0

R/W

Load reference coordinates. This bit shall be written as 1

before the set of coordinates are written to REFCOORD.

Write 0 to this bit after the last coordinate has been written.

0

RUN

0

R0W1

Location estimate start. This bit shall be written as 1 when

desired coordinates and parameters have been written to

REFCOORD and MEASPARM registers. Estimation

process starts when 1 is written to this bit. Always read as

0.

Table 6: Register LOCENG (0xDF57)

Bit

Name

Reset

R/W

Description

7:0

LOCX

00h

R

Location estimate X coordinate.

Table 7: Register LOCX (0xDF58)

Bit

Name

Reset

R/W

Description

7:0

LOCY

00h

R

Location estimate Y coordinate.

Table 8: Register LOCY (0xDF59)

Bit

Name

Reset

R/W

Description

7:0

LOCMIN

00h

R

Location estimate minimum value

Table 9: Register LOCMIN (0xDF5A)

Bit

Name

Reset

R/W

Description

7:0

VERSION[7:0]

0x01

R

Chip revision number

Table 10: Register CHVER (0xDF60)

Bit

Name

Reset

R/W

Description

7:0

CHIPID[7:0]

0x89

R

Chip identification number. Always read as 0x89.

Table 11: Register CHIPID (0xDF61)