ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 312

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

Table 182. CRC/PAD Features of EMAC Configuration Register
PS027001-0707
Bit
Position
0
DCRCC
ADPADN
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
VLPADN
Table 182
Register 1.
Value
0
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
PADEN
Description
No proprietary header. Normal operation.
Four bytes of proprietary header, ignored by CRC, exists on
the front of IEEE 802.3 frames.
shows the results of different settings for bits [7:4] of EMAC Configuration
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CRCEN Result
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
No pad or CRC appended.
CRC appended.
Pad to 60 bytes if necessary; append CRC (min. size = 64).
Pad to 60 bytes if necessary; append CRC (min. size = 64).
No pad or CRC appended.
CRC appended.
Pad to 64 bytes if necessary, append CRC (min. size = 68).
Pad to 64 bytes if necessary, append CRC (min. size = 68).
No pad or CRC appended.
CRC appended.
If VLAN not detected, pad to 60, add CRC.
If VLAN detected, pad to 64, add CRC.
If VLAN not detected, pad to 60, add CRC.
If VLAN detected, pad to 64, add CRC.
No pad or CRC appended.
CRC appended.
If VLAN not detected, pad to 60, add CRC.
If VLAN detected, pad to 64, add CRC.
If VLAN not detected, pad to 60, add CRC.
If VLAN detected, pad to 64, add CRC.
Ethernet Media Access Controller
Product Specification
eZ80F91 ASSP
304