AS3910 datasheet(32/47 Pages) AMSCO

32 / 47 page

www.austriamicrosystems.com/HF_RFID_Reader/AS3910

Revision 2.3

32 - 47

AS3910

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

8.11.6 AM Modulation Depth and Antenna Driver Registers

Note:

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

Note:

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

Note:

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

Table 26. Modulation Depth Definition Register

Address # 10: Modulation Depth Definition Register

type: RW

Bit

Name

Def.

Function

Comments

7am_s

→ AM modulated level is defined by bits mod5 to mod0.

Level is adjusted automatically by Calibrate Modulation Depth

command

→ AM modulated level is defined by bits dram7 to dram0.

mod5

MSB

See Application Notes for details about AM

modulation level definition.

mod4

mod3

mod2

mod1

mod0

LSB

Table 27. Modulation Depth Display Register

Address # 11: Modulation Depth Display Register

type: R

Bit

Name

Function

Comments

md_7

MSB

Displays result of Calibrate Modulation Depth command.

Antenna drivers are composed of 8 binary weighted

segments. Bit md_x set to one indicates that this

particular segment will be disabled during AM modulated

state.

md_6

md_5

md_4

md_3

md_2

md_1

md_0

LSB

Table 28. Antenna Driver AM Modulated Level Definition

Address # 12: Antenna Driver AM Modulated Level Definition

type: RW

Bit

Name

Def.

Function

Comments

7dram7

MSB

Antenna drivers are composed of 8 binary weighted

segments. Setting a bit dram to 1 will disable

corresponding segment during AM modulated state in

case am_s bit is set to 1.

6dram6

5dram5

4dram4

3dram3

2dram2

1dram1

0dram0

LSB

AS3910 датащи(PDF) 32 Page - ams AG

AS3910 датащи(HTML) 32 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

датащи скачать

ссылки URL