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)： 24/99頁
文件大?。?/td> 1945K
代理商： LPC2939FBD208
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
24 of 99
NXP Semiconductors
LPC2939
ARM9 microcontroller with CAN, LIN, and USB
The index sector is a special sector in which the JTAG access protection and sector
security are located. The address space becomes visible by setting the FS_ISS bit and
overlaps the regular flash sector’s address space.
Note that the index sector, once programmed, cannot be erased. Any flash operation must
be executed out of SRAM (internal or external).
6.8.3
Flash bridge wait-states
To eliminate the delay associated with synchronizing flash-read data, a predefined
number of wait-states must be programmed. These depend on flash-memory response
time and system clock period. The minimum wait-states value can be calculated with the
following formulas:
Synchronous reading:
(1)
Asynchronous reading:
(2)
Remark:
If the programmed number of wait-states (WST) is more than three, flash-data
reading cannot be performed at full speed (i.e. with zero wait-states at the AHB bus) if
speculative reading is active.
6.8.4
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
.
16
17
18
0
1
2
3
4
5
6
7
8
9
10
8
8
8
64
64
64
64
64
64
64
64
64
64
64
0x2000 A000
0x2000 C000
0x2000 E000
0x2001 0000
0x2002 0000
0x2003 0000
0x2004 0000
0x2005 0000
0x2006 0000
0x2007 0000
0x2008 0000
0x2009 0000
0x200A 0000
0x200B 0000
Table 10.
Sector number
Flash sector overview
…continued
Sector size (kB)
Sector base address
WST
t
t
clk sys
-----------------
1
–
WST
t
t
clk sys
-----------------
1
–
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