LPC2458FET180,551 NXP Semiconductors, LPC2458FET180,551 Datasheet - Page 232

• Manufacturer Part Number: LPC2458FET180,551
• Description: IC ARM7 MCU FLASH 512K 180TFBGA
• Manufacturer: NXP Semiconductors
• Series: LPC2400r

Specifications of LPC2458FET180,551

• 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: 136
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• 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
• Package / Case: 180-TFBGA
• Processor Series: LPC24
• Core: ARM7TDMI-S
• Data Bus Width: 32 bit
• Data Ram Size: 98 KB
• Interface Type: CAN, Ethernet, I2C, I2S, IrDA, SPI, SSP, UART, USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 136
• 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, SAB-TFBGA180
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• On-chip Dac: 10 bit, 1 Channel
• Package: 180TFBGA
• Device Core: ARM7TDMI-S
• Family Name: LPC2000
• Maximum Speed: 72 MHz
• For Use With: 622-1023 - BOARD SCKT ADAPTER FOR TFBGA180622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 568-4258; 935282454551; LPC2458FET180-S

NXP Semiconductors
UM10237_4
User manual
7.2.10 Transmit Number of Descriptors Register (TxDescriptorNumber -
7.2.11 Transmit Produce Index Register (TxProduceIndex - 0xFFE0 0128)
Table 214. Transmit Status Base Address register (TxStatus - address 0xFFE0 0120) bit
The transmit status base address is a byte address aligned to a word boundary i.e. LSB
1:0 are fixed to ’00’. The register contains the lowest address in the array of statuses.
0xFFE0 0124)
The Transmit Number of Descriptors register (TxDescriptorNumber) has an address of
0xFFE0 0124. Its bit definition is shown in
Table 215. Transmit Number of Descriptors register (TxDescriptorNumber - address
The transmit number of descriptors register defines the number of descriptors in the
descriptor array for which TxDescriptor is the base address. The number of descriptors
should match the number of statuses. The register uses minus one encoding i.e. if the
array has 8 elements, the value in the register should be 7.
The Transmit Produce Index register (TxProduceIndex) has an address of 0xFFE0 0128.
Its bit definition is shown in
Table 216. Transmit Produce Index register (TxProduceIndex - address 0xFFE0 0128) bit
The transmit produce index register defines the descriptor that is going to be filled next by
the software transmit driver. The transmit descriptor array is empty as long as
TxProduceIndex equals TxConsumeIndex. If the transmit hardware is enabled, it will start
transmitting frames as soon as the descriptor array is not empty. After a frame has been
processed by software, it should increment the TxProduceIndex. The value must be
wrapped to 0 once the value of TxDescriptorNumber has been reached. If the
TxProduceIndex equals TxConsumeIndex - 1 the descriptor array is full and software
should stop producing new descriptors until hardware has transmitted some frames and
updated the TxConsumeIndex.
Bit
1:0
31:2
Bit
15:0
31:16
Bit
15:0
31:16
Symbol
TxDescriptorNumber Number of descriptors in the descriptor array for which
-
Symbol
TxProduceIndex Index of the descriptor that is going to be filled next by the
-
Symbol
-
TxStatus
description
0xFFE0 0124) bit description
description
Function
Fixed to ’00’
MSBs of transmit status base address.
Rev. 04 — 26 August 2009
Function
transmit software driver.
Unused
Table
Function
TxDescriptor is the base address. The register is minus
one encoded.
Unused
11–216.
Table
11–215.
Chapter 11: LPC24XX Ethernet
UM10237
© NXP B.V. 2009. All rights reserved.
Reset
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