AS3911 datasheet(94/149 Pages) AMSCO

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AS3911 – 94

ams Datasheet, Confidential: 2013-Oct [2-03]

A p pl i c at io n I n f o r m at i o n

Antenna Calibration Target Register

Figure 82:

Antenna Calibration Target Register

Note:

Default setting is set at power-up and after Set Default command.

Antenna Calibration Display Register

Figure 83:

Antenna Calibration Display Register

Note:

At power-up and after Set Default command, content of this register is set to 0.

Address 22h: Antenna Calibration Target Register

Type: RW

Bit

Name

Default

Function

Comments

7act7

Define target phase for

Calibrate Antenna direct

command

6act6

5act5

4act4

3act3

2act2

1act1

0act0

Address 23h: Antenna Calibration Display Register

Type: R

Bit

Name

Default

Function

Comments

7tri_3

MSB

This register stores result of Calibrate

Antenna command. LC trim switches are

defined by data written in this register in

case trim_s = 0. A bit set to 1 indicates that

corresponding transistor on TRIM1_x and

TRIM2_x pin is switched on.

6tri_2

5tri_1

4tri_0

LSB

tri_err

1: Antenna calibration error

Set when Calibrate antenna sequence was

not able to adjust resonance

Not used

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