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AS3955 Datasheet(PDF) 50 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) 50 Page - ams AG

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[v1-01] 2015-Apr-29
AS3955 − Detailed Description
Extended Mode Timing Diagram
Figure 53:
RF to MCU Data Transfer in Extended Mode
RF field
NFC reader
WRITE
0xFC,
0x001122
33
WRITE
0xFD,
0x445566
77
WRITE
0xFE,
0x8899AA
BB
WRITE
0xFF,
0xCCDDE
EFF
READ
0xFC
Tag state
SENSE
RESOLUTI
ON
SELECTED
AS3955 RF
response
ACK
ACK
ACK
ACK
0x000000
00
0x000000
00
0x000000
00
0x000000
02
0xFC
0x00000000
0x00112233
0x00112233
0x00112233
0x00112233
0x00000000
0xFD
0x00000000
0x00000000
0x44556677
0x44556677
0x44556677
0x00000000
0xFE
0x00000000
0x00000000
0x00000000
0x8899AABB
0x8899AABB
0x00000000
0xFF
0x00000000
0x00000000
0x00000000
0x00000000
0xCCDDEEFF
0x00000000
AS3955
SPI/I²C
0x10
0x001122
33
0x445566
77
0x8899AA
BB
0xCCDDE
EFF
MCU
SPI/I²C
Read IRQ
Read
Buffer
Length
Buffer
Read
Clear
Buffer
RX start
Rx end
Tx end
rf_busy
rf_data_rdy
io_busy
io_data_rdy
RF field ON
Anti collision
sequence
Power off
Anti collision
sequence
RF TO BUFFER DATA TRANSFER
BUFFER TO MCU DATA TRANSFER
Buffer content
TAG INITIALIZATION



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