MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 1830

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 454MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Program Memory Size: 128KB (32K x 32)
• Program Memory Type: Mask ROM
• Ram Size: 32K x 32
• Voltage - Supply (vcc/vdd): 1.25 V ~ 5.25 V
• Data Converters: A/D 17x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

Congestion Resolution
29.4.10.6.5 Management Frame Forwarding
If the management port transmits Frames, they are forwarded according to the port mask
defined in the configuration register MGMT_CONFIG. A handshaking mechanism is
implemented that can be used by the firmware to configure the destination port mask on a
frame-by-frame basis for management frames.
29.4.10.7 Congestion Resolution
29.4.10.7.1 Overview
The congestion resolution function is used whenever an output port is not available and
data needs to be sent to that port. An output port is defined to be available if the port is
enabled (bit in PORT_ENA set 1) and the output buffer (shared memory) is not congested.
If, for a port, one of these conditions is not valid, the port is not available and frames cannot
be switched to that port.
The congestion resolution function determines whether the frame should be processed
further or discarded according to the following rules:
29.4.10.7.2 Unique Destination (one input to one output)
If the output port is enabled and can accept a frame the frame will be forwarded normally.
In any other case the frame will be discarded. If a frame switched to port N, the counter
ODISCN is incremented.
29.4.10.7.3 Multiple Destinations (Flooding)
After broadcast / flooding resolution a frame needs to be switched to multiple output ports.
1830
• 01-80-c2-00-00-10 (Bridge Management Address, 802.1d, Table 7-10)
• "01-80-c2-00-00-20 to
• Output disabled:
• Output congestion:
01-80-c2-00-00-2F (Generic Attribute Registration Protocol, 802.1d, Table 12-1)
All disabled ports are removed from the list of outputs.
VLAN domain verification/discard (see register VLAN_VERIFY)
should be switched off for the management port to avoid that the
switch discards management frames.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Note
Freescale Semiconductor, Inc.