LPC1769FBD100,551 NXP Semiconductors, LPC1769FBD100,551 Datasheet - Page 175

• Manufacturer Part Number: LPC1769FBD100,551
• Description: IC ARM CORTEX MCU 512K 100-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC17xxr

Specifications of LPC1769FBD100,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 100-LQFP
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: CAN, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 70
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x12b, 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: 70
• 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, MCB1760, MCB1760U, MCB1760UME
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 10 bit
• 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: 568-4966; 935290522551

NXP Semiconductors
UM10360
User manual
Fig 20. Transmit descriptor memory layout
TxDescriptorNumber
10.15.2 Transmit descriptors and statuses
TxDescriptor
1
2
3
4
5
[1]
For multi-fragment frames, the value of the AlignmentError, RangeError, LengthError,
SymbolError and CRCError bits in all but the last fragment in the frame will be 0; likewise
the value of the FailFilter, Multicast, Broadcast, VLAN and ControlFrame bits is undefined.
The status of the last fragment in the frame will copy the value for these bits from the
MAC. All fragment statuses will have valid LastFrag, RxSize, Error, Overrun and
NoDescriptor bits.
Figure 20
Transmit descriptors are stored in an array in memory. The lowest address of the transmit
descriptor array is stored in the TxDescriptor register, and must be aligned on a 4 byte
address boundary. The number of descriptors in the array is stored in the
TxDescriptorNumber register using a minus one encoding style i.e. if the array has 8
elements the register value should be 7. Parallel to the descriptors there is an array of
statuses. For each element of the descriptor array there is an associated status field in the
status array. The base address of the status array is stored in the TxStatus register, and
must be aligned on a 4 byte address boundary. During operation (when the transmit data
path is enabled) the TxDescriptor, TxStatus, and TxDescriptorNumber registers should
not be modified.
The EMAC doesn't distinguish the frame type and frame length, so, e.g. when the IP(0x8000) or
ARP(0x0806) packets are received, it compares the frame type with the max length and gives the "Range"
error. In fact, this bit is not an error indication, but simply a statement by the chip regarding the status of the
received frame.
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
depicts the layout of the transmit descriptors in memory.
PACKET
PACKET
PACKET
PACKET
PACKET
PACKET
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
DATA BUFFER
DATA BUFFER
DATA BUFFER
DATA BUFFER
DATA BUFFER
DATA BUFFER
TxStatus
Chapter 10: LPC17xx Ethernet
StatusInfo
StatusInfo
StatusInfo
StatusInfo
StatusInfo
StatusInfo
UM10360
© NXP B.V. 2010. All rights reserved.
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