參數(shù)資料
型號: EFM32G222F128
廠商: Energy Micro
文件頁數(shù): 19/136頁
文件大小: 0K
描述: IC MCU 32BIT 128KB FLASH 48LQFP
特色產(chǎn)品: EFM32 Gecko
標(biāo)準(zhǔn)包裝: 1
系列: Gecko
核心處理器: ARM? Cortex?-M3
芯體尺寸: 32-位
速度: 32MHz
連通性: I²C,IrDA,智能卡,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,DMA,POR,PWM,WDT
輸入/輸出數(shù): 37
程序存儲器容量: 128KB(128K x 8)
程序存儲器類型: 閃存
RAM 容量: 16K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.8 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x12b,D/A 1x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 48-TQFP
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: 914-1027-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
115
www.energymicro.com
Reserved
31
24 23
16 15
8 7
1 0
IREGION
DREGION
Reserved
SEPARATE
Table 4.39. TYPE register bit assignments
Bits
Name
Function
[31:24]
-
Reserved.
[23:16]
IREGION
Indicates the number of supported MPU instruction regions.
Always contains 0x00. The MPU memory map is unified and is described by the DREGION field.
[15:8]
DREGION
Indicates the number of supported MPU data regions:
0x08
= Eight MPU regions.
[7:0]
-
Reserved.
[0]
SEPARATE
Indicates support for unified or separate instruction and date memory maps:
0 = unified.
4.5.2 MPU Control Register
The MPU CTRL register:
enables the MPU
enables the default memory map background region
enables use of the MPU when in the hard fault, Non-maskable Interrupt (NMI), and FAULTMASK
escalated handlers.
See the register summary in Table 4.38 (p. 114) for the MPU CTRL attributes. The bit assignments are:
31
1 0
Reserved
HFNMIENA
ENABLE
2
PRIVDEFENA
3
Table 4.40. MPU CTRL register bit assignments
Bits
Name
Function
[31:3]
-
Reserved.
[2]
PRIVDEFENA
Enables privileged software access to the default memory map:
0 = If the MPU is enabled, disables use of the default memory map. Any memory access to a
location not covered by any enabled region causes a fault.
1 = If the MPU is enabled, enables use of the default memory map as a background region for
privileged software accesses.
When enabled, the background region acts as if it is region number -1. Any region that is
defined and enabled has priority over this default map.
If the MPU is disabled, the processor ignores this bit.
[1]
HFNMIENA
Enables the operation of MPU during hard fault, NMI, and FAULTMASK handlers.
When the MPU is enabled:
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