LAN9312 Datasheet, PDF (228/458 Pages) SMSC Corporation – High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
14.2.5.24 1588 Command Register (1588_CMD)
Offset:
19Ch
Size:
32 bits
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 159 for additional information.
BITS
DESCRIPTION
31:1 RESERVED
0 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.
TYPE
RO
WO
SC
DEFAULT
-
0b
Revision 1.2 (04-08-08)
228
DATASHEET
SMSC LAN9312