MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 1635

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX281AVM4B

• 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: Supplier Unconfirmed

26.3.10.4 Wakeup
When a Magic Packet was detected, indicated by an asserted EIR(WAKEUP), the
configuration bit ECR(SLEEP) should be cleared to resume normal operation of the MAC.
Clearing the SLEEP bit will automatically mask the MAGIC_ENA bit, disabling magic
packet detection.
This will also deassert the external pin magic_det.
26.3.11 IP Accelerator Functions
26.3.11.1 Checksum Calculation
The IP and ICMP, TCP, UDP checksums are calculated with one's complement arithmetic
summing up 16-bit values.
For ICMP, the checksum is calculated over the complete ICMP datagram (that is, without
IP header).
For TCP and UDP, the checksums contain the header and data sections and in addition the
values from the IP header, which can be seen as a pseudo header that is not actually present
as such in the datastream.
Freescale Semiconductor, Inc.
Figure 26-17. IPv6 Pseudo Header for Checksum Calculation
Figure 26-16. IPv4 Pseudo Header for Checksum calculation
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
3
1
zero
1
3
2
7
2
7
2
3
protocol
2
3
destination address
destination address
source address
source address
zero
TCP/UDP length
1
9
1
9
1
5
1
5
TCP/UDP length
1
1
1
1
7
next header
7
3
3
0
0
Chapter 26 Ethernet Controller (ENET)
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