NEC Network Controller uPD98502 - Manual (Page 30)

CHAPTER 1 INTRODUCTION
30 Preliminary User’s 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
M II
I/O B U F
E th e rn e t C o n tro lle r
M A C
C o re
D M A C IB U S
T PO +
T ran sceiver
F IFO
C ont.
IB
U
S
Co
n
tr
o
ll
e
r
T x F IF O
R x F IF O
T PO -
TP I+
TP I-
M II