MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 852

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Ethernet (ETH): media access control (MAC) with DMA controller
852/995
Figure 294. MAC frame format
Figure 295. Tagged MAC frame format
Each byte of the MAC frame, except the FCS field, is transmitted low-order bit first.
An invalid MAC frame is defined by one of the following conditions:
●
●
●
The frame length is inconsistent with the expected value as specified by the length/type
field. If the length/type field contains a type value, then the frame length is assumed to
be consistent with this field (no invalid frame)
The frame length is not an integer number of bytes (extra bits)
The CRC value computed on the incoming frame does not match the included FCS
42-1500 bytes
QTag Prefix
4 bytes
46-1500 bytes
2 bytes
7 bytes
6 bytes
6 bytes
4 bytes
1 byte
MSB
7 bytes
6 bytes
6 bytes
2 bytes
4 bytes
MSB
1 byte
Bit transmission order (r ight to left)
Length/type = 802.1QTagType
Frame check sequence
Tag control information
MAC client length/type
Destination address
MAC client data
Source address
Bit transmission order (right to left)
Doc ID 13902 Rev 9
Preamble
SFD
Pad
Frame check sequence
MAC client length/type
Destination address
Source address
MAC client data
Preamble
SFD
PAD
frame transmitted
LSB
top to bottom
bytes within
MSB
1
User priority
0
VLAN identifier (VID, 12 bits)
frame transmitted
LSB
0
0
top to bottom
Bytes within
0
0
0
0
CFI
0
0
0
0
0
0
0
0
LSB
RM0008
ai15630
ai15629
1
0