Nec Network Controller uPD98502 Instrukcja Użytkownika Strona 30

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CHAPTER 1 INTRODUCTION
30
Preliminary Users Manual S15543EJ1V0UM
1.5.5 Ethernet controller
Ethernet Controller supports 2-channel 10 Mbps/100 Mbps Ethernet MAC (Media Access Control) function and MII
(Media Independent Interface) function.
Features of Ethernet Controller are as follows;
Supports 10 M/100 M Ethernet MAC function compliant to IEEE802.3 and IEEE802.3u
Supports 3.3 V MII compliant to IEEE802.3u
Supports full duplex operation for both 100 Mbps and 10 Mbps
Supports flow control function compliant to IEEE802.3x/D3.2
Implements 256-Byte FIFO buffer for each Tx and Rx
Implements address filtering functions for unicast/multicast/broadcast
Implements MIB counters for network management (MIB II, Ether-like MIB, IEEE802.3LME are supported)
Implements local DMA controller with individual DMA channels for each Tx and Rx
Figure 1-7. Block Diagram of Ethernet Controller
MII
I/O BUF
Ethernet Controller
MAC
Core
DMAC
IBUS
TPO+
Transceiver
FIFO
Cont.
IBUS
Controller
Tx FIFO
Rx FIFO
TPO-
TPI+
TPI-
MII
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