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AS3953A bảng dữ liệu(PDF) 40 Page - ams AG

tên linh kiện AS3953A
Giải thích chi tiết về linh kiện  14443 High Speed Passive Tag Interface
PDF  70 Pages
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nhà sản xuất  AMSCO [ams AG]
Trang chủ  http://www.ams.com
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AS3953A bảng dữ liệu(HTML) 40 Page - ams AG

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[v1-05] 2019-Feb-15
AS3953A − Detailed Description
Reading Received Data from FIFO
Reading received data from the FIFO is similar to reading data
from an addressable registers. Difference is that in case of
reading more bytes they all come from the FIFO. The command
mode code 10 indicates FIFO operations. In case of reading the
received data from the FIFO all bits <C5 – C0> are set to ‘1’. On
the following SCLK rising edges the data from FIFO appears as
in case of read data from addressable registers. In case the
command is terminated by putting /SS high before a packet of
8 bits composing one byte is read that particular byte is
considered read.
Direct Command Mode
Direct Command Mode has no arguments, so a single byte is
sent. SPI operation mode bits 11 indicate Direct Command
Mode. The following six bits define command code, sent MSB
to the LSB. The command is executed on falling edge of last
clock.
Figure 48:
Sending of a Direct Command
1
1
C5
C4
C3
C2
C1
C0
X
X
SCLK rising
edge Data is
transfered from
µC
SCLK falling
edge Data is
sampled
/SS rising edge signals
start of command
execution
Two leading
ONE indicate
COMMAND
Mode
/SS
SCLK
MOSI



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