LPC2470FET208,551 NXP Semiconductors, LPC2470FET208,551 Datasheet - Page 245
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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Manufacturer
Quantity
Price
Company:
Part Number:
LPC2470FET208,551
Manufacturer:
Exar
Quantity:
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Part Number:
LPC2470FET208,551
Manufacturer:
NXP Semiconductors
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UM10237_4
User manual
Fig 29. Transmit descriptor memory layout
TxDescriptorNumber
8.2 Transmit descriptors and statuses
TxDescriptor
1
2
3
4
5
Figure 11–29
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
datapath is enabled) the TxDescriptor, TxStatus, and TxDescriptorNumber registers
should not be modified.
Two registers, TxConsumeIndex and TxProduceIndex, define the descriptor locations that
will be used next by hardware and software. Both register act as counters starting at 0 and
wrapping when they reach the value of TxDescriptorNumber. The TxProduceIndex
contains the index of the next descriptor that is going to be filled by the software driver.
The TxConsumeIndex contains the index of the next descriptor going to be transmitted by
the hardware. When TxProduceIndex == TxConsumeIndex, the transmit buffer is empty.
When TxProduceIndex == TxConsumeIndex -1 (taking wraparound into account), the
transmit buffer is full and the software driver cannot add new descriptors until the
hardware has transmitted one or more frames to free up descriptors.
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
PACKET
PACKET
PACKET
PACKET
PACKET
PACKET
depicts the layout of the transmit descriptors in memory.
Rev. 04 — 26 August 2009
DATA BUFFER
DATA BUFFER
DATA BUFFER
DATA BUFFER
DATA BUFFER
DATA BUFFER
TxStatus
Chapter 11: LPC24XX Ethernet
StatusInfo
StatusInfo
StatusInfo
StatusInfo
StatusInfo
StatusInfo
UM10237
© NXP B.V. 2009. All rights reserved.
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