SMSC LAN9312 - Manual (Page 218)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 218 SMSC LAN9312
DATASHEET
14.2.5.18 1588 Clock Target Reload High-DWORD Register (1588_CLOCK_TARGET_RELOAD_HI)
This read/write register combined with 1588 Clock Target Reload/Add Low-DWORD Register
(1588_CLOCK_TARGET_RELOAD_LO) form the 64-bit 1588 Clock Target Reload value. The 1588
Clock Target Reload is the value that is reloaded to the 1588 Clock Compare value when a clock
compare event occurs and the
Reload/Add (RELOAD_ADD) bit of the 1588 Configuration Register
(1588_CONFIG) is set. Refer to Chapter 11, "IEEE 1588 Hardware Time Stamp Unit," on page 154 for
additional information.
Note: Both this register and the 1588 Clock Target Reload/Add Low-DWORD Register
(1588_CLOCK_TARGET_RELOAD_LO) must be written for either to be affected.
Offset: 184h Size: 32 bits
BITS DESCRIPTION TYPE DEFAULT
31:0 Clock Target Reload High (CLOCK_TARGET_RELOAD_HI)
This field contains the high 32-bits of the 64-bit 1588 Clock Target Reload
value that is reloaded to the 1588 Clock Compare value. R/W 00000000h