LAN9303 Datasheet, PDF (120/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
register is not affected. Multiple registers may be written in a multiple write cycle, each one being
written after 32-bits. I²C writes must not be performed to unused register addresses.
Figure 8.10 illustrates a typical single and multiple register write.
Control Byte
Address Byte
Data Byte
Data Byte... ...Data Byte
S
S
A
6
S
A
5
S
A
4
S
A
3
S
A
2
S
A
1
S
A
0
0
A
C
K
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
C
K
D
3
1
D
3
0
D
2
9
D
2
8
S
2
7
D
2
6
D
2
5
D
2
4
A
C
K
D
2
3
D
2
2
D
2
1
D
2
...
0
D
5
D
4
D
3
D
2
D
1
D
0
A
C
K
P
Single Register Write
Control Byte
Address Byte
Data 1 Byte
...Data m Byte
Data m+1 Byte... ...Data n Byte
... ... ... _S
S
A
6
S
A
5
S
A
4
S
A
3
S
A
2
S
A
1
S
A
0
0
A
C
K
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
C
K
D
3
1
D
3
0
DDA
2 2C
54K
D
5
D
4
D
3
D
2
D
1
D
0
A
C
K
D
3
1
D
3
0
D
2
9
D
2
8
D
2
7
D
2
6
D
2
5
D
5
D
4
D
3
D
2
D
1
D
0
A
C
K
P
Multiple Register Writes
Figure 8.10 I²C Slave Writes
Revision 1.3 (08-27-09)
120
DATASHEET
SMSC LAN9303/LAN9303i