LPC2468FET208,551 NXP Semiconductors, LPC2468FET208,551 Datasheet - Page 277

• Manufacturer Part Number: LPC2468FET208,551
• Description: IC ARM7 MCU FLASH 512K 208TFBGA
• Manufacturer: NXP Semiconductors
• Series: LPC2400r

Specifications of LPC2468FET208,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 208-TFBGA
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 160
• Ram Size: 98K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC24
• Core: ARM7TDMI-S
• Data Bus Width: 16 bit, 32 bit
• Data Ram Size: 98 KB
• Interface Type: CAN/I2S/ISP/SSP/UART/USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 160
• Number Of Timers: 6
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, IRD-LPC2468-DEV, SAB-TFBGA208, KSK-LPC2468-PL
• Development Tools By Supplier: OM10100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• On-chip Dac: 1-ch x 10-bit
• Package: 208TFBGA
• Device Core: ARM7TDMI-S
• Family Name: LPC2000
• Maximum Speed: 72 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1025 - KIT DEV IND REF DESIGN LPC2468622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4358 - DISPLAY QVGA TFT FOR OM10100568-4309 - BOARD EXTENSION LPCSTICK568-4308 - EVAL LPC-STICK WITH LPC2468MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4262; 935283234551; LPC2468FET208-S

NXP Semiconductors
UM10237_4
User manual
9.23.1 DMA access
9.22 Ethernet errors
9.23 AHB bandwidth
To do a full soft reset of the Ethernet block, device driver software must:
To reset just the transmit datapath, the device driver software has to:
To reset just the receive datapath, the device driver software has to:
The Ethernet block generates errors for the following conditions:
The Ethernet block is connected to an AHB bus which must carry all of the data and
control information associated with all Ethernet traffic in addition to the CPU accesses
required to operate the Ethernet block and deal with message contents.
Assumptions
By making some assumptions, the bandwidth needed for each type of AHB transfer can
be calculated and added in order to find the overall bandwidth requirement.
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RegReset: Resets all of the datapaths and registers in the host registers module,
excluding the registers in the MAC. A soft reset of the registers will also abort all AHB
transactions of the transmit and receive datapath. The reset bit will be cleared
autonomously by the Ethernet block.
Set the ‘SOFT RESET’ bit in the MAC1 register to 1.
Set the RegReset bit in the Command register, this bit clears automatically.
Reinitialize the MAC registers (0x000 to 0x0FC).
Reset the ‘SOFT RESET’ bit in the MAC1 register to 0.
Set the ‘RESET MCS/Tx’ bit in the MAC1 register to 1.
Disable the Tx DMA managers by setting the TxEnable bits in the Command register
to 0.
Set the TxReset bit in the Command register, this bit clears automatically.
Reset the ‘RESET MCS/Tx’ bit in the MAC1 register to 0.
Disable the receive function by resetting the ‘RECEIVE ENABLE’ bit in the MAC1
configuration register and resetting of the RxEnable bit of the Command register.
Set the ‘RESET MCS/Rx’ bit in the MAC1 register to 1.
Set the RxReset bit in the Command register, this bit clears automatically.
Reset the ‘RESET MCS/Rx’ bit in the MAC1 register to 0.
A reception can cause an error: AlignmentError, RangeError, LengthError,
SymbolError, CRCError, NoDescriptor, or Overrun. These are reported back in the
receive StatusInfo and in the interrupt status register (IntStatus).
A transmission can cause an error: LateCollision, ExcessiveCollision,
ExcessiveDefer, NoDescriptor, or Underrun. These are reported back in the
transmission StatusInfo and in the interrupt status register (IntStatus).
Rev. 04 — 26 August 2009
Chapter 11: LPC24XX Ethernet
UM10237
© NXP B.V. 2009. All rights reserved.
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