參數(shù)資料
型號: EFM32TG222F32
廠商: Energy Micro
文件頁數(shù): 124/136頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 32KB FLASH 48LQFP
特色產品: EFM32 Tiny Gecko
標準包裝: 1
系列: Tiny 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
外圍設備: 欠壓檢測/復位,DMA,I²S,POR,PWM,WDT
輸入/輸出數(shù): 37
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.8 V
數(shù)據(jù)轉換器: 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: 標準包裝
其它名稱: 914-1029-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
88
www.energymicro.com
4 The Cortex-M3 Peripherals
4.1 About the peripherals
The address map of the Private peripheral bus (PPB) is:
Table 4.1. Core peripheral register regions
Address
Core peripheral
Description
0xE000E008
-0xE000E00F
System control block
0xE000E010
-0xE000E01F
System timer
0xE000E100
-0xE000E4EF
Nested Vectored Interrupt Controller
0xE000ED00
-0xE000ED3F
System control block
0xE000ED90
-0xE000EDB8
Memory protection unit
1
0xE000EF00
-0xE000EF03
Nested Vectored Interrupt Controller
1Software can read the MPU Type Register at 0xE000ED90 to test for the presence of a memory protection unit (MPU). Register
will read as zero if MPU is not present.
In register descriptions:
the register type is described as follows:
RW Read and write.
RO Read-only.
WO Write-only.
the required privilege gives the privilege level required to access the register, as follows:
Privileged
Only privileged software can access the register.
Unprivileged
Both unprivileged and privileged software can access the register.
4.2 Nested Vectored Interrupt Controller
This section describes the Nested Vectored Interrupt Controller (NVIC) and the registers it uses. The
NVIC supports:
The number of interrupts given by Table 1.1 (p. 5) .
A programmable priority level of 0-7 for each interrupt. A higher level corresponds to a lower priority,
so level 0 is the highest interrupt priority.
Level detection of interrupt signals.
Dynamic reprioritization of interrupts.
Grouping of priority values into group priority and subpriority fields.
Interrupt tail-chaining.
The processor automatically stacks its state on exception entry and unstacks this state on exception
exit, with no instruction overhead. This provides low latency exception handling. The hardware
implementation of the NVIC registers is:
Table 4.2. NVIC register summary
Address
Name
Type
Required
privilege
Reset value
Description
0xE000E100
-
0xE000E104
ISER0-
ISER1
RW
Privileged
0x00000000
0XE000E180
-
0XE000E184
ICER0-
ICER1
RW
Privileged
0x00000000
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