參數(shù)資料
型號: ADUC7032BSTZ-8V-RL
廠商: Analog Devices Inc
文件頁數(shù): 51/128頁
文件大小: 0K
描述: IC BATTERY SENSOR PREC 48-LQFP
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 20.48MHz
連通性: LIN,SPI,UART/USART
外圍設(shè)備: POR,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 9
程序存儲器容量: 96KB(48K x 16)
程序存儲器類型: 閃存
RAM 容量: 1.5K x 32
電壓 - 電源 (Vcc/Vdd): 3.5 V ~ 18 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 2x16b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 105°C
封裝/外殼: 48-LQFP
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: ADUC7032BSTZ-8V-RLDKR
Preliminary Technical Data
ADuC7032
Rev. PrD | Page 29 of 128
Remap
The ARM exception vectors are all situated at the bottom of the
memory
array,
from
address
0x00000000
to
address
0x00000020.
By default, after a reset, the Flash/EE memory is logically
mapped to address 0x00000000.
It is possible to logically REMAP the SRAM to address
0x00000000. This is done by a setting bit zero of the SYSMAP0
MMR, which is located at 0xFFFF0220. To revert Flash/EE to
0x00000000, bit zero of SYSMAP0 is cleared.
It may be desirable to remap RAM to 0x00000000 to optimize
the interrupt latency of the ADuC7032, as code may be run in
full 32bit ARM mode and at the maximum core speed. It should
be noted that when an exception occurs, the core will default to
ARM mode.
Remap operation
When a reset occurs on the ADuC7032, execution starts
automatically in the factory programmed internal configuration
code. This so called kernel is hidden and cannot be accessed by
user code. If the ADuC7032 is in normal mode, it will execute
the power-on configuration routine of the kernel and then jump
to the reset vector address, 0x00000000, to execute the users
reset exception routine.
Because the Flash/EE is mirrored at the bottom of the memory
array at reset, the reset routine must always be written in
Flash/EE.
Precaution must be taken to execute the REMAP command
from the absolute Flash/EE address, and not from the mirrored,
remapped segment of memory, as this will be replaced by the
SRAM. If a remap operation is executed whilst operating code
from the mirrored location, Prefetch/Data aborts may occur or
the user may observe abnormal program operation.
This operation is reversible: the Flash/EE memory may be
remapped at address 0x00000000 by clearing bit zero of the
SYSMAP0 MMR. Precaution must again be taken to execute the
remap function from outside the mirrored area.
Any kind of reset will logically remap the Flash/EE memory to
the bottom of the memory array.
SYSMAP0 Register :
Name :
SYSMAP0
Address :
0xFFFF0220
Default Value :
0x00
Access :
Read/Write Access
Function :
This 8-bit register allows user code to remap either RAM or Flash/EE memory space into the bottom of the ARM
memory
space starting at location 0x00000000.
Table 8: SYSMAP0 MMR Bit Designations
Bit
Description
7-1
Reserved
These bits are reserved and should be written as 0 by user code
0
Remap Bit.
Set by the user to remap the SRAM to 0x00000000.
Cleared automatically after reset to remap the Flash/EE memory to 0x00000000.
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