Datasheet 搜索 > 微控制器 > TI（德州仪器） > LM3S6965-IQC50-A2T 数据手册 > LM3S6965-IQC50-A2T 数据手册 372/761 页
器件3D模型￥ 249.791
LM3S6965-IQC50-A2T 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
微控制器
封装:
LQFP-100
描述:
的Stellaris LM3S6965微控制器 Stellaris LM3S6965 Microcontroller
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P160P172P336P396P433P476P514P551P599P612P650Hot
典型应用电路图在P47P610
原理图在P44P45P54P55P56P160P240P260P293P335P372P395
封装尺寸在P52P749P750P752P753P754P756P757P759P760
型号编码规则在P747
标记信息在P747P757P758
封装信息在P747P751P752P756P757P758P759P760
功能描述在P95P161P172P241P260P292P336P372P397P434P476P515
技术参数、封装参数在P699P701P702P703P705
应用领域在P44P58P179P761
电气规格在P52P700P702P704P706P708P710P712P714P716
导航目录
LM3S6965-IQC50-A2T数据手册
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10.1 Block Diagram
Figure 10-1. WDT Module Block Diagram
Control / Clock /
Interrupt
Generation
WDTCTL
WDTICR
WDTRIS
WDTMIS
WDTLOCK
WDTTEST
WDTLOAD
WDTVALUE
Comparator
32-Bit Down
Counter
0x00000000
Interrupt
System Clock
Identification Registers
WDTPCellID0 WDTPeriphID0 WDTPeriphID4
WDTPCellID1 WDTPeriphID1 WDTPeriphID5
WDTPCellID2 WDTPeriphID2 WDTPeriphID6
WDTPCellID3 WDTPeriphID3 WDTPeriphID7
10.2 Functional Description
The Watchdog Timer module generates the first time-out signal when the 32-bit counter reaches
the zero state after being enabled; enabling the counter also enables the watchdog timer interrupt.
After the first time-out event, the 32-bit counter is re-loaded with the value of the Watchdog Timer
Load (WDTLOAD) register, and the timer resumes counting down from that value. Once the
Watchdog Timer has been configured, the Watchdog Timer Lock (WDTLOCK) register is written,
which prevents the timer configuration from being inadvertently altered by software.
If the timer counts down to its zero state again before the first time-out interrupt is cleared, and the
reset signal has been enabled (via the WatchdogResetEnable function), the Watchdog timer
asserts its reset signal to the system. If the interrupt is cleared before the 32-bit counter reaches its
second time-out, the 32-bit counter is loaded with the value in the WDTLOAD register, and counting
resumes from that value.
If WDTLOAD is written with a new value while the Watchdog Timer counter is counting, then the
counter is loaded with the new value and continues counting.
July 15, 2014372
Texas Instruments-Production Data
Watchdog Timer
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