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参数资料
型号： ST10F269Z2Q3
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
封装： 28 X 28 MM, PLASTIC, QFP-144
文件页数： 8/160页
文件大小： 1541K
代理商： ST10F269Z2Q3
ST10F269
105/160
17 - WATCHDOG TIMER
The Watchdog Timer is a fail-safe mechanism which prevents the microcontroller from malfunctioning for
long periods of time.
The Watchdog Timer is always enabled after a reset of the chip and can only be disabled in the time
interval until the EINIT (end of initialization) instruction has been executed.
Therefore, the chip start-up procedure is always monitored. The software must be designed to service the
watchdog timer before it overflows. If, due to hardware or software related failures, the software fails to do
so, the watchdog timer overflows and generates an internal hardware reset. It pulls the RSTOUT pin low
in order to allow external hardware components to be reset.
Each of the different reset sources is indicated in the WDTCON register.
The indicated bits are cleared with the EINIT instruction. The origine of the reset can be identified during
the initialization phase.
WDTCON (FFAEh / D7h)
SFR
Reset Value: 00xxh
Notes: 1. More than one reset indication flag may be set. After EINIT, all flags are cleared.
2. Power-on is detected when a rising edge from VDD = 0 V to VDD > 2.0 V is recognized on the internal 3.3V supply.
3. These bits cannot be directly modified by software.
15
14
13
12
11
10
9
8
765
4321
0
WDTREL
-
PONR LHWR SHWR
SWR
WDTR WDTIN
RW
HR
RW
WDTIN
Watchdog Timer Input Frequency Selection
‘0’: Input Frequency is fCPU/2.
‘1’: Input Frequency is fCPU/128.
WDTR1-3
Watchdog Timer Reset Indication Flag
Set by the watchdog timer on an overflow.
Cleared by a hardware reset or by the SRVWDT instruction.
SWR1-3
Software Reset Indication Flag
Set by the SRST execution.
Cleared by the EINIT instruction.
SHWR1-3
Short Hardware Reset Indication Flag
Set by the input RSTIN.
Cleared by the EINIT instruction.
LHWR1-3
Long Hardware Reset Indication Flag
Set by the input RSTIN.
Cleared by the EINIT instruction.
PONR1- 2-3
Power-On (Asynchronous) Reset Indication Flag
Set by the input RSTIN if a power-on condition has been detected.
Cleared by the EINIT instruction.
相关PDF资料
PDF描述
ST10F269Z2Q6 16-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP144
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相关代理商/技术参数
参数描述
ST10F269Z2Q6 功能描述:16位微控制器 - MCU 256K Flash 12K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
ST10F269Z2Q6/TR 功能描述:16位微控制器 - MCU 16B MCU 256K Byte and 12K Byte RAM RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
ST10F269Z2QX 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:16-BIT MCU WITH MAC UNIT, 256K BYTE FLASH MEMORY AND 12K BYTE RAM
ST10F269Z2T3 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
ST10F269Z2T6 功能描述:16位微控制器 - MCU ST10F272 16B MCU RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
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