mcs7830 MosChip, mcs7830 Datasheet - Page 13

• Manufacturer Part Number: mcs7830
• Description: Usb-2.0 To Ethernet
• Manufacturer: MosChip

Rev.
The 8-bit status of the Receiver is appended to the data as the last Byte in each Ethernet frame. The receiver
status vector defi nition is as follows:
So the status vector received as a last Byte at the end of each Ethernet frame is 0x20 if it is a correct frame.
3.1
Bit-7
[7:6]
Bit
0
1
2
3
4
5
Reserved
0:
1:
0:
1:
0:
1:
0:
1:
0:
1:
0:
1:
Reserved
Bit-6
Indicates the received frame length is greater than or equal to 64 Bytes and
less than 1518 Bytes. It is a normal frame.
Indicates the received frame length is less than 64 Bytes (short frame).
Indicates the received frame does not have a length error.
Received data length in the frame is exactly matched with the L/T fi eld of the
Ethernet frame.
Indicates the received frame has a length error.
Received data length is not matched with the L/T fi eld of the Ethernet frame.
Indicates there is no alignment error in the received frame.
It has received an even number of nibbles.
Indicates there is an alignment error.
Indicates there is no CRC error.
Received CRC is matched with the CRC calculated.
Indicates a CRC error.
Indicates the received frame is a normal frame.
Indicates the received frame is a large frame whose length is >1518 Bytes.
Indicates the received frame is not correct.
Indicates the received frame is a correct frame.
Bit-5
RX
Ok
Frame
Large
Bit-4
Description
Bit-3
Error
FCS
Alignment
Bit-2
Error
MCS7830
USB-2.0 to Ethernet
Length
Bit-1
Error
Frame
Short
Bit-0
Page 13