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AS3953A-BDFM Fiches technique(PDF) 39 Page - ams-OSRAM AG

No de pièce AS3953A-BDFM
Description  14443 High Speed Passive Tag Interface
PDF  71 Pages
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Fabricant  AMSOSRAM [ams-OSRAM AG]
Site Internet  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3953A-BDFM Fiches technique(HTML) 39 Page - ams-OSRAM AG

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Page 38
ams Datasheet
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[v1-05] 2019-Feb-15
AS3953A − Detailed Description
EEPROM Read
In order to read data from EEPROM first a mode byte is sent,
followed by the word address byte (MSB first). Then one or more
words of data with address auto incrementing (packets of 4
bytes) are transferred to MISO output, always from the MSB to
the LSB. MOSI is sampled at the falling edge of SCLK; data to be
read from the AS3953A EEPROM is driven to MISO pin on rising
edge of SCLK and is sampled by the master at the falling edge
of SCLK. In case the word on defined address does not exist all
‘0’ data is sent to MISO.
Please note that SCLK frequency should not exceed 1MHz
during EEPROM Read (limited by EEPROM read access time).
Figure 46:
Reading of EEPROM Page
01 1 1 1 1 1 1
W
A
4
W
A
3
W
A
2
W
A
1
W
A
0
x
W
A
6
W
A
5
X
MSB Byte from
Address
<WA6-WA0>
/SS
SCLK
MOSI
X
B
2
9
B
2
8
B
2
7
B
2
6
B
2
5
B
2
4
B
3
1
B
3
0
B
2
3
B
2
2
B
5
B
4
B
3
B
2
B
1
B
0
B
7
B
6
B
9
B
8
XX
LSB Byte from
Address
<WA6-WA0>
X
MISO
1µs min



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