ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 306

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

PS027001-0707
Note:
For an official description of an Ethernet packet, refer to IEEE 802.3 specification, Figure
3-1.
The descriptor table contains three entries: the next pointer (NP), the packet size
(Pkt_Size) and the packet status (Stat), as illustrated in
NP is a 24-bit pointer to the start of the next packet. Pkt_Size contains the number of bytes
of data in the Ethernet packet, including the four CRC bytes, but does not contain the
seven descriptor table bytes. Stat contains the status of the packet. Stat differs for Transmit
and Receive packets. See
TWP
TWP
Descriptor
Ethernet
Pkt_Size
Packet
Table
Stat
NP
Figure 62. Descriptor Table Entries
Table 178
Figure 61. Descriptor Table
Offset
0007h
0000h
Offset
0005h
0003h
0000h
and
Table 179
on page 299.
Figure
Ethernet Media Access Controller
62.
Product Specification
eZ80F91 ASSP
298