LAN9312-NZW SMSC, LAN9312-NZW Datasheet - Page 155

• Manufacturer Part Number: LAN9312-NZW
• Description: Ethernet ICs Hi Per 2 Port 10/100 Ethernet Switch
• Manufacturer: SMSC
• Type: Two Port Managed Ethernet Switchr

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

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
11.1.2
Ethernet
Ethernet
GPIO[8:9]
GPIO[8:9]
(Outputs)
(Inputs)
10/100
10/100
PHY
PHY
Time Stamp
IEEE 1588
Block Diagram
The LAN9312 IEEE 1588 implementation is illustrated in
major function blocks:
RX: Delay_Req for Master, Sync for Slave
TX: Sync for Master, Delay_Req for Slave
IEEE 1588 Time Stamp
These three identical blocks provide time stamping functions on all switch fabric ports.
IEEE 1588 Clock
This block provides a 64-bit tunable clock that is used as the time source for all IEEE 1588 time
stamp related functions.
IEEE 1588 Clock/Events
This block provides IEEE 1588 clock comparison-based interrupt generation and time stamp related
GPIO event generation.
Sync / Delay_Req
Sync / Delay_Req
Msg Detect RX
Msg Detect TX
MII
MII
TX
RX
Switch Fabric
IEEE 1588 Clock Events
IEEE 1588 Time Stamp
Time Stamp
IEEE 1588
Figure 11.1 IEEE 1588 Block Diagram
MII
Sequence ID Capture RX
Sequence ID Capture TX
Clock Capture GPIO8
Clock Capture GPIO9
Src UUID Capture RX
Src UUID Capture TX
64 Bit Reload / Add
64 Bit Clock Target
Clock Capture RX
Clock Capture TX
compare >=
load / add
IRQ Flag
IRQ Flag
IRQ Flag
IRQ Flag
IRQ Flag
DATASHEET
155
host
host
IRQ Enables
Figure
IRQ Flags
32 Bit Accumulator
11.1, and consists of the following
To Host MAC
32 Bit Addend
64 Bit Clock
IEEE 1588 Clock
inc
+
X9
Revision 1.7 (06-29-10)
To INT_STS register
carry
host