- Standard Microsystems Ethernet Switch Specifications Sheet

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Datasheet

SMSC LAN9311/LAN9311i 229 Revision 1.4 (08-19-08)

DATASHEET

14.2.5.24 1588 Command Register (1588_CMD)

This register is used to issue 1588 commands. Using the clock snapshot bit allows the host to properly

read the current IEEE 1588 clock values from the 1588 Clock High-DWORD Register

(1588_CLOCK_HI) and 1588 Clock Low-DWORD Register (1588_CLOCK_LO). Refer to section

Section 11.3, "IEEE 1588 Clock," on page 160 for additional information.

Offset: 19Ch Size: 32 bits

BITS DESCRIPTION TYPE DEFAULT

31:1 RESERVED RO -

Clock Snapshot (1588_CLOCK_SNAPSHOT)

Setting this bit causes the current 1588 Clock High-DWORD Register

(1588_CLOCK_HI) and 1588 Clock Low-DWORD Register

(1588_CLOCK_LO) values to be saved so they can be read.