LPC2458FET180,551 NXP Semiconductors, LPC2458FET180,551 Datasheet - Page 375

• 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
Fig 48. UDCA Head register and DMA Descriptors
UDCA HEAD
REGISTER
14.2 USB device communication area
14.3 Triggering the DMA engine
UDCA
DDP-EP16
DDP-EP31
The CPU and DMA controller communicate through a common area of memory, called the
USB Device Communication Area, or UDCA. The UDCA is a 32-word array of DMA
Descriptor Pointers (DDPs), each of which corresponds to a physical endpoint. Each DDP
points to the start address of a DMA Descriptor, if one is defined for the endpoint. DDPs
for unrealized endpoints and endpoints disabled for DMA operation are ignored and can
be set to a NULL (0x0) value.
The start address of the UDCA is stored in the USBUDCAH register. The UDCA can
reside at any 128-byte boundary of RAM that is accessible to both the CPU and DMA
controller.
Figure 13–48
register and DMA Descriptors.
An endpoint raises a DMA request when Slave mode is disabled by setting the
corresponding bit in the USBEpIntEn register to 0
interrupt occurs (see
- 0xFFE0
A DMA transfer for an endpoint starts when the endpoint is enabled for DMA operation in
USBEpDMASt, the corresponding bit in USBDMARSt is set, and a valid DD is found for
the endpoint.
All endpoints share a single DMA channel to minimize hardware overhead. If more than
one DMA request is active in USBDMARSt, the endpoint with the lowest physical endpoint
number is processed first.
DDP-EP2
0
1
2
16
31
C250)”).
illustrates the UDCA and its relationship to the UDCA Head (USBUDCAH)
NULL
NULL
NULL
Section 13–9.8.1 “USB DMA Request Status register (USBDMARSt
Rev. 04 — 26 August 2009
Next_DD_pointer
Next_DD_pointer
DD-EP16-a
DD-EP2-a
Chapter 13: LPC24XX USB device controller
Next_DD_pointer
Next_DD_pointer
DD-EP16-b
DD-EP2-b
(Section
13–9.4.2) and an endpoint
NULL
Next_DD_pointer
DD-EP2-c
UM10237
© NXP B.V. 2009. All rights reserved.
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NULL