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參數(shù)資料
| 型號(hào)： | 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)： | 23/99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
23 of 99
NXP Semiconductors
LPC2939
ARM9 microcontroller with CAN, LIN, and USB
With dual buffering, a secondary buffer line is used, the output of the flash being
considered as the primary buffer. On a primary buffer, hit data can be copied to the
secondary buffer line, which allows the flash to start a speculative read of the next flash
word.
Both buffer lines are invalidated after:
Initialization
Configuration-register access
Data-latch reading
Index-sector reading
The modes of operation are listed in
Table 9
.
Table 9.
Synchronous timing
No buffer line
Single buffer line
6.8.2
Flash layout
The ARM processor can program the flash for ISP (In-System Programming) through the
flash memory controller. Note that the flash always has to be programmed by ‘flash words’
of 128 bits (four 32-bit AHB bus words, hence 16 bytes).
The flash memory is organized into eight ‘small’ sectors of 8 kB each and up to 11 ‘large’
sectors of 64 kB each. The number of large sectors depends on the device type. A sector
must be erased before data can be written to it. The flash memory also has sector-wise
protection. Writing occurs per page which consists of 4096 bits (32 flash words). A small
sector contains 16 pages; a large sector contains 128 pages.
Table 10
gives an overview of the flash-sector base addresses.
Table 10.
Sector number
11
12
13
14
15
Flash read modes
for single (non-linear) reads; one flash-word read per word read
default mode of operation; most recently read flash word is kept until
another flash word is required
Asynchronous timing
No buffer line
Single buffer line
one flash-word read per word read
most recently read flash word is kept until another flash word is
required
on a buffer miss a flash read is done, followed by at most one
speculative read; optimized for execution of code with small loops
(less than eight words) from flash
most recently used flash word is copied into second buffer line; next
flash-word read is started; highest performance for linear reads
Dual buffer line, single
speculative
Dual buffer line, always
speculative
Flash sector overview
Sector size (kB)
8
8
8
8
8
Sector base address
0x2000 0000
0x2000 2000
0x2000 4000
0x2000 6000
0x2000 8000
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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(shí)鐘頻率:72 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
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