VT6516 ETC, VT6516 Datasheet - Page 30

• Manufacturer Part Number: VT6516
• Description: 16/12 PORT 10/1000 ASE T/TX
• Manufacturer: ETC

IEEE standard (Please see IEEE 802.3u Fast Ethernet standard) . Each Fast Ethernet port has following
characteristics:
(RMII) interface. The signals of RMII interface are described in Table-3-1
3.1.4 Network interface
-
-
-
-
-
-
The VT6516 communicates with the external 10/100M Ethernet transceiver through the reduced MII
The VT6516 directly connect to 16 port RMII PHY or 12 port MII PHY device which compliant with
3.1.4.1 RMII interface
Capable of supporting both 10MBps and 100MBps data rates in half and full duplex modes.
Provide a simple management interface (SMI) for port status
Perform all functions of the IEEE 802.3 protocol such as frame formatting, frame stripping, collision
handling, deferred, etc.
Adjustable preamble ,SFD and inter frame gap (IFG).
IEEE 802.3X flow control supported
IEEE 802.1D spanning tree protocol support, and all port state of listen and block configurable
VIA Technologies, Inc.
Name
CRSDV
RXD[0-1]
TXEN
TXD[0-1]
Table 3-1 RMII interface signals
Figure 3-1 RMII timing diagram
Type
I
I
O
O
-30-
(omitted)
Description
Carrier sense and Data
valid
Receive data bit 0 to 1 ,
data rate with 50MHz
Transmit Enable
Transmit Data bit 0 to
1
Preliminary VT6516 Datarsheet