LAN9312-NZW SMSC, LAN9312-NZW Datasheet - Page 142
![Ethernet ICs Hi Per 2 Port 10/100 Ethernet Switch](/photos/27/13/271362/lan9312_sml.jpg)
LAN9312-NZW
Manufacturer Part Number
LAN9312-NZW
Description
Ethernet ICs Hi Per 2 Port 10/100 Ethernet Switch
Manufacturer
SMSC
Type
Two Port Managed Ethernet Switchr
Datasheet
1.LAN9312-NZW.pdf
(458 pages)
Specifications of LAN9312-NZW
Ethernet Connection Type
10 Base-T, 100 Base-TX
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Product
Ethernet Switches
Number Of Transceivers
1
Standard Supported
802.3, 802.3u
Data Rate
10 Mbps, 100 Mbps
Supply Voltage (max)
3.3 V
Supply Voltage (min)
0 V
Supply Current (max)
186 mA, 295 mA
Maximum Operating Temperature
+ 70 C
Package / Case
TQFP-100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LAN9312-NZW
Manufacturer:
Standard
Quantity:
143
Company:
Part Number:
LAN9312-NZW
Manufacturer:
Microchip Technology
Quantity:
10 000
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Revision 1.7 (06-29-10)
10.2.2.3
10.2.2.4
A
C
K
S 1 0 1 0
C
C
A
K
A
K
Control Byte
Chip / Block
Select Bits
S 1 0 1 0
S 1 0 1 0
I
Following the device addressing, a data byte may be read from the EEPROM by outputting a start
condition and control byte with a control code of 1010b, chip/block select bits as described in
Section
8-bits of data. If the EEPROM slave fails to send an acknowledge, then the sequence is aborted and
the EPC_TIMEOUT bit in the
sends a no-acknowledge, followed by a stop condition.
Figure 10.4
For a register level description of a read operation, refer to
Operation," on page
I
Following the device addressing, data bytes may be read sequentially from the EEPROM by outputting
a start condition and control byte with a control code of 1010b, chip/block select bits as described in
Section
8-bits of data. If the EEPROM slave fails to send an acknowledge, then the sequence is aborted and
the EPC_TIMEOUT bit in the
sends an acknowledge, and the EEPROM responds with the next 8-bits of data. This continues until
the last desired byte is read, at which point the I
stop condition.
Figure 10.4
addressing.
Single Byte Addressing Read
2
2
C EEPROM Byte Read
C EEPROM Sequential Byte Reads
A
1
0
Control Byte
Control Byte
Chip / Block
Chip / Block
A
9
Select Bits
Select Bits
10.2.2.2, and the R/~W bit high. The EEPROM will respond with an acknowledge, followed by
10.2.2.2, and the R/~W bit high. The EEPROM will respond with an acknowledge, followed by
A
8
A
1
0
0 0 0
1
R/~W
illustrates typical I
A
9
illustrates typical I
A
C
K
A
8
D
7
1
1
Figure 10.5 I
R/~W
R/~W
D
6
A
C
K
A
C
K
138.
Data Byte
D
5
D
D
7
7
D
4
Figure 10.4 I
D
6
D
6
Double Byte Addressing Sequential Reads
Single Byte Addressing Sequential Reads
D
3
Data Byte
Data Byte
D
5
D
5
D
2
D
D
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
4
4
2
EEPROM Command Register (E2P_CMD)
EEPROM Command Register (E2P_CMD)
C EEPROM byte read for single and double byte addressing.
2
D
D
3
D
3
1
C EEPROM Sequential Byte Reads
2
C EEPROM sequential byte reads for single and double byte
D
D
2
2
D
0
DATASHEET
D
D
1
1
A
C
K
2
C EEPROM Byte Read
D
0
D
0
P
A
C
K
A
C
K
142
D
7
D
7
D
6
D
6
A
C
K
Data Byte
Data Byte
D
D
5
5
S 1 0 1 0
2
D
D
4
4
C master sends a no-acknowledge, followed by a
D
3
D
3
D
2
D
2
Control Byte
Chip / Block
Select Bits
D
1
D
1
Double Byte Addressing Read
D
0
D
0
0 0 0
A
C
K
A
C
K
Section 10.2.1, "EEPROM Controller
...
...
D
7
D
7
1
R/~W
D
D
6
6
A
C
K
Data Byte
Data Byte
D
5
D
5
is set. The I
is set. The I
D
7
D
4
D
4
D
6
D
D
3
3
Data Byte
D
5
D
2
D
2
D
D
D
1
1
4
D
D
0
0
D
3
2
2
C master then
C master then
SMSC LAN9312
A
C
K
A
C
K
D
2
P
P
D
1
Datasheet
D
0
A
C
K
P
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