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AS3956 Datasheet(PDF) 74 Page - ams AG

Part # AS3956
Description  NFC Forum Compliant Dynamic Tag
PDF  107 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3956 Datasheet(HTML) 74 Page - ams AG

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Page 74
ams Datasheet
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[v1-11] 2018-Nov-14
AS3956 − Detailed Description
EEPROM Read
In order to read data from EEPROM, first a slave address and
mode byte is sent, followed by the block address byte (MSB
first). Then one or more blocks of data with address
auto-incrementing (packets of 4 bytes) are transferred via SDA
line, also MSB first. SDA is sampled at the SCL falling edge. In
case the block on defined address does not exist, all 0 data is
sent via SDA line.
Figure 77:
Reading a EEPROM Block over I²C
Loading Transmission Data into Buffer
Loading the transmitting data into the buffer is similar to
writing data into an addressable register. Difference is that, in
case of loading more bytes, all bytes go to the buffer. The
command mode code 10b indicates buffer operations.
The following figure shows how to load the transmitting data
into the buffer.
Figure 78:
Loading Data into Buffer over I²C
A
6
A
5
A
4
A
3
A
2
A
1
A
0
0
1
11
111
A
C
K
0
S
Slave address
W
A
6
W
A
5
W
A
4
W
A
3
W
A
2
W
A
1
1
A
C
K
W
A
0
x
EEPROM page
address
EEPROM read
command
SCL
SDA
A
C
K
P
Slave address
A
2
A
1
A
0
1
A
C
K
A
4
A
3
A
6
A
5
S
Data
D
3
D
2
D
1
D
0
N
A
K
D
5
D
4
D
7
D
6
A
6
A
5
A
4
A
3
A
2
A
1
A
0
0
0
00
000
A
C
K
1
P
S
Data
Slave address
D
7
D
6
D
5
D
4
D
3
D
2
0
A
C
K
D
1
D
0
D
3
D
2
D
1
D
0
A
C
K
D
5
D
4
D
7
D
6
Data
Load buffer
command
SCL
SDA
A
C
K



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