參數(shù)資料
型號(hào)： LPC2926FBD144
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, PQFP144
封裝： 20 X 20 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT486-1, LQFP-144
文件頁數(shù)： 21/95頁
文件大?。?/td> 1855K
代理商： LPC2926FBD144
LPC2926_27_29
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 5 — 28 September 2010
21 of 95
NXP Semiconductors
LPC2926/2927/2929
ARM9 microcontroller with CAN, LIN, and USB
When an AHB data port read transfer requires data from a different flash word to that
involved in the previous read transfer, a new flash read is done and wait states are given
until the new read data is available.
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
Pin description
The flash memory controller has no external pins. However, the flash can be programmed
via the JTAG pins, see
Section 6.6.3
.
6.8.3
Clock description
The flash memory controller is clocked by CLK_SYS_FMC, see
Section 6.7.2
.
6.8.4
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.
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
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LPC2927FBD144,551 功能描述:ARM微控制器 - MCU ARM968 512K FL/16K 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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