LAN9312 Datasheet, PDF (206/458 Pages) SMSC Corporation – High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

14.2.5.6
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Port x 1588 Clock Low-DWORD Transmit Capture Register (1588_CLOCK_LO_TX_CAPTURE_x)
Offset:
Port 1: 114h
Port 2: 134h
Port 0: 154h
Size:
32 bits
BITS
DESCRIPTION
31:0 Timestamp Low (TS_LO)
This field contains the low 32-bits of the timestamp taken on the
transmission of a 1588 Sync or Delay_Req packet.
TYPE
RO
DEFAULT
00000000h
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.
Revision 1.2 (04-08-08)
206
DATASHEET
SMSC LAN9312