ST25R3910 datasheet(50/65 Pages) STMICROELECTRONICS

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ST25R3910

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DocID029768 Rev 2

1.3.19

Antenna Driver AM Modulated Level Definition Register

Address: 12h

Type: RW

1.3.20

Antenna Driver Non-Modulated Level Definition Register

Address: 13h

Type: RW

Table 26. Antenna Driver AM Modulated Level Definition Register(1)

Bit

Name

Default

Function

Comments

dram7

MSB

Antenna drivers are composed of 8 binary

weighted segments. Setting one of dram bits to 1

will disable the corresponding segment during

AM modulated state in case am_s bit is set to 1.

dram6

dram5

dram4

dram3

dram2

dram1

dram0

LSB

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

Table 27. Antenna Driver Non-Modulated Level Definition Register(1)

Bit

Name

Default

Function

Comments

droff7

MSB

Antenna drivers are composed of 8 binary

weighted segments. Setting one of droff bits to 1

will disable the corresponding segment during

normal non-modulated operation.

6droff6

5droff5

4droff4

3droff3

2droff2

1droff1

0droff0

LSB

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

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