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AS3910 데이터시트(PDF) 23 Page - ams AG

부품명 AS3910
상세설명  13.56 MHz RFID Reader IC, ISO-14443 A/B
PDF  77 Pages
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제조업체  AMSCO [ams AG]
홈페이지  http://www.ams.com
Logo AMSCO - ams AG

AS3910 데이터시트(HTML) 23 Page - ams AG

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ams Datasheet, Confidential: 2013-Oct [3-02]
AS3909/AS3910 – 23
Appl icatio n I n f o rm a t i o n
SPI Operation MODE Bits
When signal SEN is low, the SPI interface is in reset and SDATAO
is in tristate; when it is high, SPI interface is enabled. It is
recommended to keep signal SEN low whenever the SPI
interface is not in use. SDATAI is sampled at the falling edge of
SCLK. All communication is done in blocks of 8 bits (bytes). First
two bits of first byte transmitted after low to high transition of
SEN define SPI operation mode. Figure 13 defines possible
modes:
Figure 13:
SPI Operation Patterns <A7-A6>
MODE
MODE Pattern (com. bits)
MODE Related Data
MODE
Register Address
Register Data
M1
M0
C5
C4
C3
C2
C1
C0
D7
D6
D5
D4
D3
D2
D1
D0
WRITE
Mode
0
0
A5
A4
A3
A2
A1
A0
WD7
WD6
WD5
WD4
WD3
WD2
WD1
WD0
READ
Mode
0
1
A5
A4
A3
A2
A1
A0
RD7RD6
RD5RD4
RD3RD2
RD1
RD0
FIFO
Load
1
0
000
000
WD7
WD6
WD5
WD4
WD3
WD2
WD1
WD0
FIFO
Read
1
0
111
111
RD7RD6
RD5RD4
RD3RD2
RD1
RD0
COMMA
ND
Mode
1
1
C5
C4
C3
C2
C1
C0



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