AS3956 datasheet(31/109 Pages) AMSCO

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ams Datasheet

Page 31

[v1-10] 2018-Apr-27

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AS3956 − Detailed Description

UID Bytes

The UID block contains four LSB bytes of the 7-byte UID which

is used during anti-collision and selection process. Every IC is

programmed by a unique number during fabrication process at

ams. See UID Coding about details on UID.

This block stores some IC manufacturer data which is

programmed and locked during fabrication process at ams.

UID is treated as IC internal configuration, and is permanently

locked during IC production.

Fabrication Data

Fabrication data are used to set internal configuration and

trimming values. They are treated as IC internal configuration.

Fabrication Data FAB_CFG0

Figure 28:

Fabrication Data FAB_CFG0

Note(s):

1. This byte can be set only during the production in a test mode.

Conf. Bit

Name

Default

Function

Note

In AS3955 this was an EEPROM

2kbit option

i2c

1: SPI interface is changed to I²C

slnt<2>

Trim bit for silent mode

slnt<1>

Trim bit for silent mode

slnt<0>

Trim bit for silent mode

rffot<2>

Trim bit for VP_REG

rffot<1>

Trim bit for VP_REG

rffot<0>

Trim bit for VP_REG

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