LPC2470FET208,551 NXP Semiconductors, LPC2470FET208,551 Datasheet - Page 214
LPC2470FET208,551
Manufacturer Part Number
LPC2470FET208,551
Description
IC ARM7 MCU LCD 208-TFBGA
Manufacturer
NXP Semiconductors
Series
LPC2400r
Datasheets
1.OM11077.pdf
(792 pages)
2.LPC2470FET208551.pdf
(89 pages)
3.LPC2470FET208551.pdf
(91 pages)
Specifications of LPC2470FET208,551
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, LCD, POR, PWM, WDT
Number Of I /o
160
Program Memory Type
ROMless
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/I2C/I2S/SPI/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, MCB2470U
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
Operating Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4362
935284071551
LPC2470FET208-S
935284071551
LPC2470FET208-S
Available stocks
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Part Number:
LPC2470FET208,551
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Part Number:
LPC2470FET208,551
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UM10237_4
User manual
5.1 Partitioning
The Ethernet block and associated device driver software offer the functionality of the
Media Access Control (MAC) sublayer of the data link layer in the OSI reference model
(see IEEE std 802.3). The MAC sublayer offers the service of transmitting and receiving
frames to the next higher protocol level, the MAC client layer, typically the Logical Link
Control sublayer. The device driver software implements the interface to the MAC client
layer. It sets up registers in the Ethernet block, maintains descriptor arrays pointing to
frames in memory and receives results back from the Ethernet block through interrupts.
When a frame is transmitted, the software partially sets up the Ethernet frames by
providing pointers to the destination address field, source address field, the length/type
field, the MAC client data field and optionally the CRC in the frame check sequence field.
Preferably concatenation of frame fields should be done by using the scatter/gather
functionality of the Ethernet core to avoid unnecessary copying of data. The hardware
adds the preamble and start frame delimiter fields and can optionally add the CRC, if
requested by software. When a packet is received the hardware strips the preamble and
start frame delimiter and passes the rest of the packet - the Ethernet frame - to the device
driver, including destination address, source address, length/type field, MAC client data
and frame check sequence (FCS).
Apart from the MAC, the Ethernet block contains receive and transmit DMA managers that
control receive and transmit data streams between the MAC and the AHB interface.
Frames are passed via descriptor arrays located in host memory, so that the hardware
can process many frames without software/CPU support. Frames can consist of multiple
fragments that are accessed with scatter/gather DMA. The DMA managers optimize
memory bandwidth using prefetching and buffering.
•
•
•
•
•
The host registers module containing the registers in the software view and handling
AHB accesses to the Ethernet block. The host registers connect to the transmit and
receive datapath as well as the MAC.
The DMA to AHB interface. This provides an AHB master connection that allows the
Ethernet block to access the Ethernet SRAM for reading of descriptors, writing of
status, and reading and writing data buffers.
The Ethernet MAC and attached RMII adapter. The MAC interfaces to the off-chip
PHY.
The transmit datapath, including:
– The transmit DMA manager which reads descriptors and data from memory and
– The transmit retry module handling Ethernet retry and abort situations.
– The transmit flow control module which can insert Ethernet pause frames.
The receive datapath, including:
– The receive DMA manager which reads descriptors from memory and writes data
– The Ethernet MAC which detects frame types by parsing part of the frame header.
– The receive filter which can filter out certain Ethernet frames by applying different
– The receive buffer implementing a delay for receive frames to allow the filter to
writes status to memory.
and status to memory.
filtering schemes.
filter out certain frames before storing them to memory.
Rev. 04 — 26 August 2009
Chapter 11: LPC24XX Ethernet
UM10237
© NXP B.V. 2009. All rights reserved.
214 of 792
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