LPC2478FET208,551 NXP Semiconductors, LPC2478FET208,551 Datasheet - Page 265
![IC ARM7 MCU 512K LCD 208-TFBGA](/photos/12/32/123264/lpc2478fet208-s_sml.jpg)
LPC2478FET208,551
Manufacturer Part Number
LPC2478FET208,551
Description
IC ARM7 MCU 512K LCD 208-TFBGA
Manufacturer
NXP Semiconductors
Series
LPC2400r
Specifications of LPC2478FET208,551
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, 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
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
622-1034 - 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
568-4364
935284072551
LPC2478FET208-S
935284072551
LPC2478FET208-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2478FET208,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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NXP Semiconductors
UM10237_4
User manual
9.10 Duplex modes
9.11 IEE 802.3/Clause 31 flow control
The destination address and source address hash CRCs being written in the
StatusHashCRC word are the nine most significant bits of the 32 bit CRCs as calculated
by the CRC calculator.
The Ethernet block can operate in full duplex and half duplex mode. Half or full duplex
mode needs to be configured by the device driver software during initialization.
For a full duplex connection the FullDuplex bit of the Command register needs to be set to
1 and the FULL-DUPLEX bit of the MAC2 configuration register needs to be set to 1; for
half duplex the same bits need to be set to 0.
Overview
For full duplex connections, the Ethernet block supports IEEE 802.3/clause 31 flow control
using pause frames. This type of flow control may be used in full-duplex point-to-point
connections. Flow control allows a receiver to stall a transmitter e.g. when the receive
buffers are (almost) full. For this purpose, the receiving side sends a pause frame to the
transmitting side.
Pause frames use units of 512 bit times corresponding to 128 rx_clk/tx_clk cycles.
Receive flow control
In full-duplex mode, the Ethernet block will suspend its transmissions when the it receives
a pause frame. Rx flow control is initiated by the receiving side of the transmission. It is
enabled by setting the ‘RX FLOW CONTROL’ bit in the MAC1 configuration register. If the
RX FLOW CONTROL’ bit is zero, then the Ethernet block ignores received pause control
frames. When a pause frame is received on the Rx side of the Ethernet block,
transmission on the Tx side will be interrupted after the currently transmitting frame has
completed, for an amount of time as indicated in the received pause frame. The transmit
datapath will stop transmitting data for the number of 512 bit slot times encoded in the
pause-timer field of the received pause control frame.
By default the received pause control frames are not forwarded to the device driver. To
forward the receive flow control frames to the device driver, set the ‘PASS ALL RECEIVE
FRAMES’ bit in the MAC1 configuration register.
Transmit flow control
If case device drivers need to stall the receive data e.g. because software buffers are full,
the Ethernet block can transmit pause control frames. Transmit flow control needs to be
initiated by the device driver software; there is no IEEE 802.3/31 flow control initiated by
hardware, such as the DMA managers.
With software flow control, the device driver can detect a situation in which the process of
receiving frames needs to be interrupted by sending out Tx pause frames. Note that due
to Ethernet delays, a few frames can still be received before the flow control takes effect
and the receive stream stops.
Rev. 04 — 26 August 2009
Chapter 11: LPC24XX Ethernet
UM10237
© NXP B.V. 2009. All rights reserved.
265 of 792
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