LPC2468FBD208,551 NXP Semiconductors, LPC2468FBD208,551 Datasheet - Page 274
LPC2468FBD208,551
Manufacturer Part Number
LPC2468FBD208,551
Description
IC ARM7 MCU FLASH 512K 208-LQFP
Manufacturer
NXP Semiconductors
Series
LPC2400r
Specifications of LPC2468FBD208,551
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, POR, PWM, WDT
Number Of I /o
160
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/I2S/ISP/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
Number Of Timers
6
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, IRD-LPC2468-DEV, SAB-TFBGA208, KSK-LPC2468-PL
Development Tools By Supplier
OM10100
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
622-1025 - KIT DEV IND REF DESIGN LPC2468622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4358 - DISPLAY QVGA TFT FOR OM10100568-4309 - BOARD EXTENSION LPCSTICK568-4308 - EVAL LPC-STICK WITH LPC2468MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4261
935282457551
LPC2468FBD208-S
935282457551
LPC2468FBD208-S
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
LPC2468FBD208,551
Manufacturer:
TI
Quantity:
1 908
Company:
Part Number:
LPC2468FBD208,551
Manufacturer:
NXP Semiconductors
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UM10237_4
User manual
Fig 35. Transmit Active/Inactive state machine
TxProduceIndex <> TxConsumeIndex
9.17 Transmission padding and CRC
TxEnable = 1
After reset, the state machine is in the INACTIVE state. As soon as the TxEnable bit is set
in the Command register and the Produce and Consume indices are not equal, the state
machine transitions to the ACTIVE state. As soon as the TxEnable bit is cleared and the
transmit datapath has completed all pending transmissions, including committing the
transmission status to memory, the state machine returns to the INACTIVE state. The
state machine will also return to the INACTIVE state if the Produce and Consume indices
are equal again i.e. all frames have been transmitted.
For the state machine in
after a soft reset the transmit datapath is inactive until the datapath is re-enabled.
In the case of a frame of less than 60 bytes (or 64 bytes for VLAN frames), the Ethernet
block can pad the frame to 64 or 68 bytes including a 4 bytes CRC Frame Check
Sequence (FCS). Padding is affected by the value of the ‘AUTO DETECT PAD ENABLE’
(ADPEN), ‘VLAN PAD ENABLE’ (VLPEN) and ‘PAD/CRC ENABLE’ (PADEN) bits of the
MAC2 configuration register, as well as the Override and Pad bits from the transmit
descriptor Control word. CRC generation is affected by the ‘CRC ENABLE’ (CRCE) and
‘DELAYED CRC’ (DCRC) bits of the MAC2 configuration register, and the Override and
CRC bits from the transmit descriptor Control word.
The effective pad enable (EPADEN) is equal to the ‘PAD/CRC ENABLE’ bit from the
MAC2 register if the Override bit in the descriptor is 0. If the Override bit is 1, then
EPADEN will be taken from the descriptor Pad bit. Likewise the effective CRC enable
(ECRCE) equals CRCE if the Override bit is 0, otherwise it equal the CRC bit from the
descriptor.
If padding is required and enabled, a CRC will always be appended to the padded frames.
A CRC will only be appended to the non-padded frames if ECRCE is set.
If EPADEN is 0, the frame will not be padded and no CRC will be added unless ECRCE is
set.
AND
Rev. 04 — 26 August 2009
Figure
TxStatus = 1
TxStatus = 0
INACTIVE
ACTIVE
11–35, a soft reset is like a hardware reset assertion, i.e.
TxEnable = 0 and not busy transmitting
TxProduceIndex = TxConsumeIndex
reset
xxxxxxxxxxxxxxxxxxxxxx
Chapter 11: LPC24XX Ethernet
OR
UM10237
© NXP B.V. 2009. All rights reserved.
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