LAN9313 Datasheet, PDF (135/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
10.1.2 Block Diagram
The LAN9313/LAN9313i IEEE 1588 implementation is illustrated in Figure 10.1, and consists of the
following major function blocks:
„ 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.
IEEE 1588
Time Stamp
IEEE 1588
Time Stamp
Ethernet _10/100
MII
MII
PHY
Switch Fabric
Ethernet _{10/100 MII}
PHY
IEEE 1588 Time Stamp
RX
Clock Capture RX
Sync / Delay_Req
Msg Detect RX
Src UUID Capture RX
Sequence ID Capture RX
RX: Delay_Req for Master, Sync for Slave
IRQ Flag
TX
Clock Capture TX
Sync / Delay_Req
Msg Detect TX
Src UUID Capture TX
Sequence ID Capture TX
host
TX: Sync for Master, Delay_Req for Slave
IRQ Flag
To External MAC/PHY
IEEE 1588 Clock
32 Bit Addend
+
32 Bit Accumulator
inc
64 Bit Clock
carry
host
GPIO[8:9]
(Outputs)
GPIO[8:9]
(Inputs)
IEEE 1588 Clock Events
64 Bit Reload / Add
load / add
64 Bit Clock Target
compare >=
IRQ Flag
Clock Capture GPIO8
IRQ Flag
Clock Capture GPIO9
IRQ Flag
host
IRQ Flags
X9
IRQ Enables
Figure 10.1 IEEE 1588 Block Diagram
To INT_STS register
SMSC LAN9313/LAN9313i
135
DATASHEET
Revision 1.2 (04-08-08)