lan9312 Standard Microsystems Corp., lan9312 Datasheet - Page 201
lan9312
Manufacturer Part Number
lan9312
Description
Lan9312 High Performance Two Port 10/100 Managed Ethernet Switch With 32-bit Non-pci Cpu Interface
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9312.pdf
(458 pages)
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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
14.2.5
14.2.5.1
BITS
31:0
Timestamp High (TS_HI)
This field contains the high 32-bits of the timestamp taken on the receipt of
a 1588 Sync or Delay_Req packet.
IEEE 1588
This section details the IEEE 1588 timestamp related registers. Each port of the LAN9312 has a 1588
timestamp block with 8 related registers, 4 for transmit capture and 4 for receive capture. These sets
of registers are identical in functionality for each port, and thus their register descriptions have been
consolidated. In these cases, the register names will be amended with a lowercase “x” in place of the
port designation. The wildcard “x” should be replaced with “1”, “2”, or “MII” for the Port 1, Port 2, and
Port 0(Host MAC) respectively. A list of all the 1588 related registers can be seen in
more information on the IEEE 1588, refer to
page
Port x 1588 Clock High-DWORD Receive Capture Register (1588_CLOCK_HI_RX_CAPTURE_x)
Note: The selection between Sync or Delay_Req packets is based on the corresponding
Note: There are multiple instantiations of this register, one for each port of the LAN9312. Refer to
Note: For Port 0(Host MAC), receive is defined as data from the switch fabric, while transmit is to
154.
master/slave bit in the
Section 14.2.5
the switch fabric.
Offset:
for additional information.
Port 1: 100h
Port 2: 120h
Port 0: 140h
DESCRIPTION
1588 Configuration Register
DATASHEET
201
Chapter 11, "IEEE 1588 Hardware Time Stamp Unit," on
Size:
(1588_CONFIG).
32 bits
TYPE
RO
Revision 1.2 (04-08-08)
Table
00000000h
DEFAULT
14.1. For
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