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LAN9252/ML 数据表(PDF) 115 Page - Microchip Technology

部件名 LAN9252/ML
功能描述  2/3-Port EtherCAT® Slave Controller with Integrated Ethernet PHYs
PDF  329 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

LAN9252/ML 数据表(HTML) 115 Page - Microchip Technology

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 2015 Microchip Technology Inc.
DS00001909A-page 115
LAN9252
10.2.6.2
Dual Data Write
The SPI Dual Data Write instruction inputs the instruction code and address bytes one bit per clock and inputs the data
two bits per clock. This instruction is supported in SPI bus protocol only with clock frequencies up to 80 MHz. This
instruction is not supported in SQI bus protocol.
The SPI slave interface is selected by first bringing SCS# active. The 8-bit SDDW instruction, 32h, is input into the SIO[0]
pin, followed by the two address bytes. The address bytes specify a BYTE address within the device.
The data follows the address bytes. The data is input into the SIO[1:0] pins starting with the msbs of the LSB. The
remaining di-bits are shifted in on subsequent clock edges. The data write to the register occurs after the 32-bits are
input. In the event that 32-bits are not written when the SCS# is returned high, the write is considered invalid and the
register is not affected.
The SCS# input is brought inactive to conclude the cycle.
Figure 10-13 illustrates a typical single and multiple register dual data write.
FIGURE 10-13:
SPI DUAL DATA WRITE
SPI Dual Data Write Single Register
SCK (active high)
SIO0
00
11
X
Instruction
1
Address
SIO1
d
e
c
Data
A
1
3
...
...
SPI Dual Data Write Multiple Registers
00
Z
X
SCK (active low)
SCS#
...
X
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
2
5
2
6
2
7
X
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
2
5
2
6
2
7
3
7
3
8
3
9
4
0
X
X
3
7
3
8
3
9
4
0
i
n
c
A
1
2
A
1
1
A
1
0
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
SCK (active high)
SIO0 X
Instruction
Address
SIO1
d
e
c
A
1
3
...
Z
SCK (active low)
SCS#
...
X
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
2
5
2
6
2
7
X
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
1
4
1
5
1
6
2
5
2
6
2
7
X
X
i
n
c
A
1
2
A
1
1
A
1
0
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
...
...
...
Data 1...
Data m
Data m+1... Data n
...
0
1
0
Data
...
D
7
D
6
D
5
Z
X
D
2
9
D
2
5
D
4
D
3
D
2
D
2
4
D
2
8
D
2
6
D
2
7
X
00
11
00
...
...
Data 1...
Data m
Data m+1... Data n
D
7
D
5
D
3
D
2
9
D
2
5
D
2
7
D
7
D
5
D
3
Z
X
D
2
9
D
2
5
D
2
7
D
6
D
4
D
2
D
2
4
D
2
8
D
2
6
D
6
D
4
D
2
D
2
4
D
2
8
D
2
6
X



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