參數(shù)資料
型號(hào)： EFM32-TG-STK3300
廠商： Energy Micro
文件頁數(shù)： 22/136頁
文件大小： 0K
描述： KIT STARTER EFM32 GECKO
特色產(chǎn)品： EFM32 Tiny Gecko
標(biāo)準(zhǔn)包裝： 1
系列： EFM®32
類型： MCU
適用于相關(guān)產(chǎn)品： EFM32-TGXXX
所含物品： 板，線纜，CD 和文檔
其它名稱： 914-1018
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
118
www.energymicro.com
RASR is accessible using word or halfword accesses:
the most significant halfword holds the region attributes
the least significant halfword holds the region size and the region and subregion enable bits.
The bit assignments are:
XN
Reserved
31
29 28 27 26
24 23 22 21
19 18 17 16 15
8 7 6 5
1 0
AP
TEX
S C B
SRD
SIZE
ENABLE
Reserved
Table 4.43. RASR bit assignments
Bits
Name
Function
[31:29]
-
Reserved.
[28]
XN
Instruction access disable bit:
0 = instruction fetches enabled1 = instruction fetches disabled.
[27]
-
Reserved.
[26:24]
AP
Access permission field, see Table 4.47 (p. 120) .
[23:22]
-
Reserved.
[21:19, 17, 16]
TEX, C, B
Memory access attributes, see Table 4.45 (p. 119) .
[18]
S
Shareable bit, see Table 4.45 (p. 119) .
[15:8]
SRD
Subregion disable bits. For each bit in this field:
0 = corresponding sub-region is enabled
1 = corresponding sub-region is disabled
See Section 4.5.8.3 (p. 122) for more information.
Region sizes of 128 bytes and less do not support subregions. When writing the attributes
for such a region, write the SRD field as 0x00.
[7:6]
-
Reserved.
[5:1]
SIZE
Specifies the size of the MPU protection region. The minimum permitted value is 3
(b00010), see See Section 4.5.5.1 (p. 118) for more information.
[0]
ENABLE
Region enable bit.
For information about access permission, see Section 4.5.6 (p. 119) .
4.5.5.1 SIZE field values
The SIZE field defines the size of the MPU memory region specified by the RNR. as follows:
(Region size in bytes) = 2
(SIZE+1)
The smallest permitted region size is 32B, corresponding to a SIZE value of 4. Table 4.44 (p. 118)
gives example SIZE values, with the corresponding region size and value of N in the RBAR.
Table 4.44. Example SIZE field values
SIZE value
Region size
Value of N
1
Note
b00100 (4)
32B
5
Minimum permitted size
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EFM32TG-STK3300 制造商:Energy Micro AS 功能描述:STARTER KIT STK3300 TINY GEC 制造商:Energy Micro AS 功能描述:STARTER KIT, STK3300, TINY GECKO; Silicon Manufacturer:Energy Micro; Core Architecture:ARM; Core Sub-Architecture:Cortex-M3; Silicon Core Number:EFM32TG840; Silicon Family Name:EFM32; Kit Contents:Starter Kit EFM32TG840; SVHC:No SVHC;RoHS Compliant: Yes
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EFM32WG230F128-QFN64 制造商:Energy Micro AS 功能描述:32 BIT ARM MPU, WONDER GECKO - Tape and Reel 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64QFN
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