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AS3911 Datasheet(PDF) 38 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) 38 Page - ams AG

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AS3911 – 38
ams Datasheet, Confidential: 2013-Oct [2-03]
A p pl i c at io n I n f o r m at i o n
During the time the MISO output is in tristate, it is possible to
switch on a 10k
Ω pull down by activating option bits miso_pd1
and miso_pd2 in the IO Configuration Register 2.
Figure 20:
Serial Data Interface (4-wire interface) Signal Lines
Figure 21:
Signal to Microcontroller
Name
Signal
Signal Level
Description
/SS
Digital input with pull-up
CMOS
SPI Enable (active low)
MOSI
Digital input
CMOS
Serial data input
MISO
Digital output with
tristate
CMOS
Serial data output
SCLK
Digital input
CMOS
Clock for serial
communication
MOSI
MISO
MISO
MOSI
AS3911
MOSI
MISO
I/O
AS3911
Separate SPI Input and Output Signals to Microcontroller
Bidirectional Data IO Signal to Microcontroller



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