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AS3956 数据表(PDF) 64 Page - ams AG

部件名 AS3956
功能描述  NFC Forum Compliant Dynamic Tag
PDF  109 Pages
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制造商  AMSCO [ams AG]
网页  http://www.ams.com
标志 AMSCO - ams AG

AS3956 数据表(HTML) 64 Page - ams AG

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Page 64
ams Datasheet
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[v1-10] 2018-Apr-27
AS3956 − Detailed Description
EEPROM Read
In order to read data from EEPROM, first a 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 to MISO output, also MSB first. MOSI is
sampled at the SCLK falling edge; data to be read from AS3956
EEPROM is driven to MISO pin on SCLK rising edge and is
sampled by the master at the SCLK falling edge. In case the
block on the 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 62:
Reading an EEPROM Block over SPI
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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