LPC1759FBD80,551 NXP Semiconductors, LPC1759FBD80,551 Datasheet - Page 185

• Manufacturer Part Number: LPC1759FBD80,551
• Description: IC ARM CORTEX MCU 512K 80-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC17xxr

Specifications of LPC1759FBD80,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 80-LQFP
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: CAN, I²C, IrDA, Microwire, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 52
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 6x12b, D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC17
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: Ethernet, USB, OTG, CAN
• Maximum Clock Frequency: 120 MHz
• Number Of Programmable I/os: 52
• Number Of Timers: 4
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 6 Channel
• On-chip Dac: 10 bit
• Package: 80LQFP
• Device Core: ARM Cortex M3
• Family Name: LPC17xx
• Maximum Speed: 120 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4968; 935290523551

NXP Semiconductors
UM10360
User manual
The transmission can generate several types of errors: LateCollision, ExcessiveCollision,
ExcessiveDefer, Underrun, and NoDescriptor. All have corresponding bits in the
transmission StatusInfo word. In addition to the separate bits in the StatusInfo word,
LateCollision, ExcessiveCollision, and ExcessiveDefer are ORed together into the Error
bit of the Status. Errors are also propagated to the IntStatus register; the TxError bit in the
IntStatus register is set in the case of a LateCollision, ExcessiveCollision, ExcessiveDefer,
or NoDescriptor error; Underrun errors are reported in the TxUnderrun bit of the IntStatus
register.
Underrun errors can have three causes:
The first and second situations are nonfatal and the device driver has to re-send the frame
or have upper software layers re-send the frame. In the third case the hardware is in an
undefined state and needs to be soft reset by setting the TxReset bit in the Command
register.
After reporting a LateCollision, ExcessiveCollision, ExcessiveDefer or Underrun error, the
transmission of the erroneous frame will be aborted, remaining transmission data and
frame fragments will be discarded and transmission will continue with the next frame in
the descriptor array.
Device drivers should catch the transmission errors and take action.
Transmit triggers interrupts
The transmit data path can generate four different interrupt types:
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The next fragment in a multi-fragment transmission is not available. This is a nonfatal
error. A NoDescriptor status will be returned on the previous fragment and the TxError
bit in IntStatus will be set.
The transmission fragment data is not available when the Ethernet block has already
started sending the frame. This is a nonfatal error. An Underrun status will be returned
on transfer and the TxError bit in IntStatus will be set.
The flow of transmission statuses stalls and a new status has to be written while a
previous status still waits to be transferred across the memory interface. This is a fatal
error which can only be resolved by a soft reset of the hardware.
If the Interrupt bit in the descriptor Control field is set, the Tx DMA will set the
TxDoneInt bit in the IntStatus register after sending the fragment and committing the
associated transmission status to memory. Even if a descriptor (fragment) is not the
last in a multi-fragment frame the Interrupt bit in the descriptor can be used to
generate an interrupt.
If the descriptor array is empty while the Ethernet hardware is enabled the hardware
will set the TxFinishedInt bit of the IntStatus register.
If the AHB interface does not consume the transmission statuses at a sufficiently high
bandwidth the transmission may underrun in which case the TxUnderrun bit will be set
in the IntStatus register. This is a fatal error which requires a soft reset of the
transmission queue.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
Chapter 10: LPC17xx Ethernet
UM10360
© NXP B.V. 2010. All rights reserved.
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