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AS3955 Datasheet(PDF) 51 Page - ams AG

Part # AS3955
Description  NFC Forum Compliant Dynamic Tag
PDF  111 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3955 Datasheet(HTML) 51 Page - ams AG

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ams Datasheet
Page 51
[v1-01] 2015-Apr-29
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AS3955 − Detailed Description
Figure 54:
MCU to RF Data Transfer in Extended Mode
RF field
NFC reader
READ 0xFC
READ
0xFC
WRITE
0xFF,
0x000000
00
Tag state
AS3955 RF
response
0x00000000
0x00000000
0x00000000
0x000000
02
0xFFEECC
AA
0x998877
66
0x554433
22
0x000000
09
ACK
0xFC
0x00000000
0x00000000
0xFFEECCAA
0xFFEECCAA
0xFFEECCAA
0x00000000
0xFD
0x00000000
0x00000000
0x00000000
0x99887766
0x99887766
0x00000000
0xFE
0x00000000
0x00000000
0x00000000
0x00000000
0x55443322
0x00000000
0xFF
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
0x00000000
AS3955
SPI/I²C
MCU
SPI/I²C
Buffer Load
0xFFEECCAA
0x99887766
0x55443322
Transmit Buffer
Read IRQ
RX start
Rx end
Tx end
rf_busy
rf_data_rdy
io_busy
io_data_rdy
MCU TO BUFFER DATA TRANSFER
BUFFER TO RF DATA TRANSFER
Buffer content



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