SMSC LAN9312 - Manual (Page 208)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 208 SMSC LAN9312
DATASHEET
14.2.5.8 Port x 1588 Source UUID Low-DWORD Transmit Capture Register
(1588_SRC_UUID_LO_TX_CAPTURE_x)
Note: The selection between Sync or Delay_Req packets is based on the corresponding
master/slave bit in the
1588 Configuration Register (1588_CONFIG) .
Note: There are multiple instantiations of this register, one for each port of the LAN9312. Refer to
Section 14.2.5 for additional information.
Note: For Port 0(Host MAC), receive is defined as data from the switch fabric, while transmit is to
the switch fabric.
Offset: Port 1: 11Ch Size: 32 bits
Port 2: 13Ch
Port 0: 15Ch
BITS DESCRIPTION TYPE DEFAULT
31:0 Source UUID Low (SRC_UUID_TX_LO)
This field contains the low 32-bits of the Source UUID from the 1588 Sync
or Delay_Req packet. RO 00000000h