MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 849
MCBSTM32EXL
Manufacturer Part Number
MCBSTM32EXL
Description
BOARD EVALUATION FOR STM32F103ZE
Manufacturer
Keil
Specifications of MCBSTM32EXL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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RM0008
27.5
27.5.1
To save a pin, the two input clock signals, RMII_REF_CK and MII_RX_CLK, are multiplexed
on the same GPIO pin.
Ethernet functional description: MAC 802.3
The IEEE 802.3 International Standard for local area networks (LANs) employs the
CSMA/CD (carrier sense multiple access with collision detection) as the access method.
The Ethernet peripheral consists of a MAC 802.3 (media access control) controller with
media independent interface (MII) and a dedicated DMA controller.
The MAC block implements the LAN CSMA/CD sublayer for the following families of
systems: 10 Mbit/s and 100 Mbit/s of data rates for baseband and broadband systems. Half-
and full-duplex operation modes are supported. The collision detection access method is
applied only to the half-duplex operation mode. The MAC control frame sublayer is
supported.
The MAC sublayer performs the following functions associated with a data link control
procedure:
●
●
Basically there are two operating modes of the MAC sublayer:
●
●
MAC 802.3 frame format
The MAC block implements the MAC sublayer and the optional MAC control sublayer
(10/100 Mbit/s) as specified by the IEEE 802.3-2002 standard.
Two frame formats are specified for data communication systems using the CSMA/CD MAC:
●
●
Data encapsulation (transmit and receive)
–
–
–
Media access management
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–
Half-duplex mode: the stations contend for the use of the physical medium, using the
CSMA/CD algorithms.
Full duplex mode: simultaneous transmission and reception without contention
resolution (CSMA/CD algorithm are unnecessary) when all the following conditions are
met:
–
–
–
Basic MAC frame format
Tagged MAC frame format (extension of the basic MAC frame format)
Framing (frame boundary delimitation, frame synchronization)
Addressing (handling of source and destination addresses)
Error detection
Medium allocation (collision avoidance)
Contention resolution (collision handling)
physical medium capability to support simultaneous transmission and reception
exactly 2 stations connected to the LAN
both stations configured for full-duplex operation
Ethernet (ETH): media access control (MAC) with DMA controller
Doc ID 13902 Rev 9
849/995
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