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AS3911 Datasheet(PDF) 43 Page - ams AG

Part # AS3911
Description  NFC Initiator / HF Reader IC
PDF  149 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3911 Datasheet(HTML) 43 Page - ams AG

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ams Datasheet, Confidential: 2013-Oct [2-03]
AS3911 – 43
Appl icatio n I n f o rm a t i o n
Figure 28:
SPI Communication: Direct Command
Direct Command Chaining
Direct commands with immediate execution can be followed
by another SPI mode (Read, Write or FIFO) without deactivating
/SS signal in between.
Figure 29:
Direct Command Chaining
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
/SS
Direct Command
Read, Write or FIFO Mode



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