LPC2478FBD208,551 NXP Semiconductors, LPC2478FBD208,551 Datasheet - Page 251
LPC2478FBD208,551
Manufacturer Part Number
LPC2478FBD208,551
Description
IC ARM7 MCU 512K LCD 208-LQFP
Manufacturer
NXP Semiconductors
Series
LPC2400r
Datasheets
1.OM11077.pdf
(91 pages)
2.OM11077.pdf
(792 pages)
3.OM11077.pdf
(10 pages)
4.LPC2478FBD208551.pdf
(89 pages)
Specifications of LPC2478FBD208,551
Program Memory Type
FLASH
Program Memory Size
512KB (512K x 8)
Package / Case
208-LQFP
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
Ram Size
96K 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/IrDA/SPI/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
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, DK-35TS-LPC2478, DK-57TS-LPC2478, DK-57VTS-LPC2478, SOMDIMM-LPC2478, SAB-TFBGA208, KSK-LPC2478-JL, MCB2470
Development Tools By Supplier
OM11015, OM11019, OM11022
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
On-chip Dac
1-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
622-1034 - PROGRAMMERS, DEVELOPMENT SYSTEMS622-1033 - KIT LCD TOUCH 5.7" FOR LPC2478MCB2470 - BOARD EVAL NXP LPC247X SERIESOM11022 - EVAL LPC-STICK WITH LPC2478OM11019 - BOARD EVAL FOR LPC2478568-4742 - MODULE DIMM LPC2478 ARM7568-4741 - KIT LCD TOUCH 5.7" FOR LPC2478622-1028 - KIT LCD TOUCH 5.7" FOR LPC2478KSDKLPC2478-PL - KIT IAR KICKSTART NXP LPC2478622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4369 - BOARD EVAL FOR LPC2478622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4363
935284069551
LPC2478FBD208-S
935284069551
LPC2478FBD208-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2478FBD208,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
Part Number:
LPC2478FBD208,551
Manufacturer:
NXP/恩智浦
Quantity:
20 000
- OM11077 PDF datasheet
- OM11077 PDF datasheet #2
- OM11077 PDF datasheet #3
- LPC2478FBD208551 PDF datasheet #4
- Current page: 251 of 792
- Download datasheet (5Mb)
NXP Semiconductors
UM10237_4
User manual
9.5 Initialization
to a fragment of a frame. By using fragments, scatter/gather DMA can be done: transmit
frames are gathered from multiple fragments in memory and receive frames can be
scattered to multiple fragments in memory.
By stringing together fragments it is possible to create large frames from small memory
areas. Another use of fragments is to be able to locate a frame header and frame payload
in different places and to concatenate them without copy operations in the device driver.
For transmissions, the Last bit in the descriptor Control field indicates if the fragment is the
last in a frame; for receive frames, the LastFrag bit in the StatusInfo field of the status
words indicates if the fragment is the last in the frame. If the Last(Frag) bit is 0 the next
descriptor belongs to the same Ethernet frame, If the Last(Frag) bit is 1 the next descriptor
is a new Ethernet frame.
After reset, the Ethernet software driver needs to initialize the Ethernet block. During
initialization the software needs to:
Depending on the PHY, the software needs to initialize registers in the PHY via the MII
Management interface. The software can read and write PHY registers by programming
the MCFG, MCMD, MADR registers of the MAC. Write data should be written to the
MWTD register; read data and status information can be read from the MRDD and MIND
registers.
The Ethernet block supports RMII and MII PHYs. During initialization software must select
MII or RMII mode by programming the Command register. After initialization, the RMII or
MII mode should not be modified.
Before switching to RMII mode the default soft reset (MAC1 register bit 15) has to be
deasserted when the Ethernet block is in MII mode . The phy_tx_clk and phy_rx_clk are
necessary during this operation. In case an RMII PHY is used (which does not provide
these clock signals), phy_tx_clk and phy_rx_clk can be connected to the phy_ref_clk.
Transmit and receive DMA engines should be initialized by the device driver by allocating
the descriptor and status arrays in memory. Transmit and receive functions have their own
dedicated descriptor and status arrays. The base addresses of these arrays need to be
programmed in the TxDescriptor/TxStatus and RxDescriptor/RxStatus registers. The
number of descriptors in an array matches the number of statuses in an array.
Please note that the transmit descriptors, receive descriptors and receive statuses are 8
bytes each while the transmit statuses are 4 bytes each. All descriptor arrays and transmit
statuses need to be aligned on 4 byte boundaries; receive status arrays need to be
aligned on 8 byte boundaries. The number of descriptors in the descriptor arrays needs to
•
•
•
•
•
•
Remove the soft reset condition from the MAC
Configure the PHY via the MIIM interface of the MAC
Select RMII or MII mode
Configure the transmit and receive DMA engines, including the descriptor arrays
Configure the host registers (MAC1,MAC2 etc.) in the MAC
Enable the receive and transmit datapaths
Rev. 04 — 26 August 2009
Chapter 11: LPC24XX Ethernet
UM10237
© NXP B.V. 2009. All rights reserved.
251 of 792
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