參數(shù)資料
型號： EFM32-TG-STK3300
廠商： Energy Micro
文件頁數(shù)： 16/136頁
文件大?。?/td> 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
112
www.energymicro.com
Bits
Name
Function
[0]
ENABLE
Enables the counter:
0 = counter disabled
1 = counter enabled.
When ENABLE is set to 1, the counter loads the RELOAD value from the LOAD register and then counts
down. On reaching 0, it sets the COUNTFLAG to 1 and optionally asserts the SysTick depending on the
value of TICKINT. It then loads the RELOAD value again, and begins counting.
4.4.2 SysTick Reload Value Register
The LOAD register specifies the start value to load into the VAL register. See the register summary in
Table 4.32 (p. 111) for its attributes. The bit assignments are:
31
0
RELOAD
Reserved
23
24
Table 4.34. LOAD register bit assignments
Bits
Name
Function
[31:24]
-
Reserved.
[23:0]
RELOAD
Value to load into the VAL register when the counter is enabled and when it reaches 0, see
4.4.2.1 Calculating the RELOAD value
The RELOAD value can be any value in the range 0x00000001-0x00FFFFFF. A start value of 0 is
possible, but has no effect because the SysTick exception request and COUNTFLAG are activated when
counting from 1 to 0.
The RELOAD value is calculated according to its use:
To generate a multi-shot timer with a period of N processor clock cycles, use a RELOAD value of N-1.
For example, if the SysTick interrupt is required every 100 clock pulses, set RELOAD to 99.
To deliver a single SysTick interrupt after a delay of N processor clock cycles, use a RELOAD of value
N. For example, if a SysTick interrupt is required after 400 clock pulses, set RELOAD to 400.
4.4.3 SysTick Current Value Register
The VAL register contains the current value of the SysTick counter. See the register summary in
Table 4.32 (p. 111) for its attributes. The bit assignments are:
31
0
CURRENT
Reserved
23
24
Table 4.35. VAL register bit assignments
Bits
Name
Function
[31:24]
-
Reserved.
[23:0]
CURRENT
Reads return the current value of the SysTick counter.
A write of any value clears the field to 0, and also clears the SysTick CTRL.COUNTFLAG bit to 0.
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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(fēng)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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