參數(shù)資料
型號： EFM32-TG-STK3300
廠商： Energy Micro
文件頁數(shù)： 15/136頁
文件大?。?/td> 0K
描述： KIT STARTER EFM32 GECKO
特色產(chǎn)品： EFM32 Tiny Gecko
標準包裝： 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
111
www.energymicro.com
Software must follow this sequence because another higher priority exception might change the MMFAR
or BFAR value. For example, if a higher priority handler preempts the current fault handler, the other
fault might change the MMFAR or BFAR value.
4.4 System timer, SysTick
The processor has a 24-bit system timer, SysTick, that counts down from the reload value to zero, reloads
(wraps to) the value in the LOAD register on the next clock edge, then counts down on subsequent
clocks.
Note
When the processor is halted for debugging the counter does not decrement.
The system timer registers are:
Table 4.32. System timer registers summary
Address
Name
Type
Required
privilege
Reset value
Description
0xE000E010
CTRL
RW
Privileged
0x00000004
0xE000E014
LOAD
RW
Privileged
0x00000000
0xE000E018
VAL
RW
Privileged
0x00000000
0xE000E01C
CALIB
RO
Privileged
0x400036B0
1SysTick calibration value.
4.4.1 SysTick Control and Status Register
The SysTick CTRL register enables the SysTick features. See the register summary in Table 4.32 (p.
111) for its attributes. The bit assignments are:
0
Reserved
31
17 16 15
3 2 1 0
Reserved
0 0
COUNTFLAG
CLKSOURCE
TICKINT
ENABLE
Table 4.33. SysTick CTRL register bit assignments
Bits
Name
Function
[31:17]
-
Reserved.
[16]
COUNTFLAG
Returns 1 if timer counted to 0 since last time this was read.
[15:3]
-
Reserved.
[2]
CLKSOURCE
Indicates the clock source:
0 = Bit 0 of RTC counter value
1 = HFCORECLK
[1]
TICKINT
Enables SysTick exception request:
0 = counting down to zero does not assert the SysTick exception request
1 = counting down to zero to asserts the SysTick exception request.
Software can use COUNTFLAG to determine if SysTick has ever counted to zero.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
EFM32WG230F128 功能描述:ARM微控制器 - MCU 128kb flash 32kb RAM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風格:SMD/SMT
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
EFM32WG230F128-QFN64T 制造商:Energy Micro AS 功能描述:WONDER GECKO 32 BIT ARM CORTEX MCU - Trays
EFM32WG230F128-QFN64-T 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64QFN
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