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| 型號： | LPC2939FBD208 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | ARM9 microcontroller with CAN, LIN, and USB |
| 中文描述： | 32-BIT, FLASH, 125 MHz, RISC MICROCONTROLLER, PQFP208 |
| 封裝： | 28 X 28 MM, 1.40 MM HEIGHT, PLASTIC, SOT-459, MS-026, LQFP-208 |
| 文件頁數(shù)： | 28/99頁 |
| 文件大?。?/td> | 1945K |
| 代理商： | LPC2939FBD208 |
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LPC2939_3
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 7 April 2010
28 of 99
NXP Semiconductors
LPC2939
ARM9 microcontroller with CAN, LIN, and USB
Usage of the idle/turn-around time (IDCY) is demonstrated In
Figure 7
. Extra wait states
are added between a read and a write cycle in the same external memory device.
Address pins on the device are shared with other functions. When connecting external
memories, check that the I/O pin is programmed for the correct function. Control of these
settings is handled by the SCU.
6.10 General Purpose DMA (GPDMA) controller
The GPDMA controller allows peripheral-to memory, memory-to-peripheral,
peripheral-to-peripheral, and memory-to-memory transactions. Each DMA stream
provides unidirectional serial DMA transfers for a single source and destination. For
example, a bidirectional port requires one stream for transmit and one for receives. The
source and destination areas can each be either a memory region or a peripheral, and
can be accessed through the same AHB master or one area by each master.
The GPDMA controls eight DMA channels with hardware prioritization. The DMA
controller interfaces to the system via two AHB bus masters, each with a full 32-bit data
bus width. DMA operations may be set up for 8-bit, 16-bit, and 32-bit data widths, and can
be either big-endian or little-endian. Incrementing or non-incrementing addressing for
source and destination are supported, as well as programmable DMA burst size. Scatter
or gather DMA is supported through the use of linked lists. This means that the source
and destination areas do not have to occupy contiguous areas of memory.
6.10.1
DMA support for peripherals
The GPDMA supports the following peripherals: SPI0/1/2 and UART0/1. The GPDMA can
access both embedded SRAM blocks (16 kB and 32 kB), both TCMs, external static
memory, and flash memory.
WSTOEN = 2, WSTWEN = 4, WST1 = 6, WST2 = 4, IDCY = 5
Fig 7.
Reading/writing external memory
OE
CLK(SYS)
CS
A
D
WSTOEN
WST1
WSTWEN
WST2
IDCY
002aae706
WE
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| LPC2939FBD208,551 | 功能描述:ARM微控制器 - MCU IC ARM9 MCU FLASH 768KB RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風格:SMD/SMT |
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