參數(shù)資料
型號(hào): EFM32TG222F32
廠商: Energy Micro
文件頁數(shù): 117/136頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 32KB FLASH 48LQFP
特色產(chǎn)品: EFM32 Tiny Gecko
標(biāo)準(zhǔn)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(shè)備: 欠壓檢測(cè)/復(fù)位,DMA,I²S,POR,PWM,WDT
輸入/輸出數(shù): 37
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)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(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: 914-1029-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
81
www.energymicro.com
CPSeffect iflags
where:
effect
is one of:
IE
Clears the special purpose register.
ID
Sets the special purpose register.
iflags
is a sequence of one or more flags:
i
Set or clear PRIMASK.
f
Set or clear FAULTMASK.
3.10.2.2 Operation
CPS
changes the PRIMASK and FAULTMASK special register values. See Section 2.1.3.6 (p. 11) for
more information about these registers.
3.10.2.3 Restrictions
The restrictions are:
use CPS only from privileged software, it has no effect if used in unprivileged software
CPS cannot be conditional and so must not be used inside an IT block.
3.10.2.4 Condition flags
This instruction does not change the condition flags.
3.10.2.5 Examples
CPSID i
; Disable interrupts and configurable fault handlers (set PRIMASK)
CPSID f
; Disable interrupts and all fault handlers (set FAULTMASK)
CPSIE i
; Enable interrupts and configurable fault handlers (clear PRIMASK)
CPSIE f
; Enable interrupts and fault handlers (clear FAULTMASK)
3.10.3 DMB
Data Memory Barrier.
3.10.3.1 Syntax
DMB{cond}
where:
cond
is an optional condition code, see Section 3.3.7 (p. 43) .
3.10.3.2 Operation
DMB
acts as a data memory barrier. It ensures that all explicit memory accesses that appear, in program
order, before the DMB instruction are completed before any explicit memory accesses that appear, in
program order, after the DMB instruction. DMB does not affect the ordering or execution of instructions
that do not access memory.
3.10.3.3 Condition flags
This instruction does not change the flags.
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