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| 型號： | SAK-TC1762-128F66HL |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, FLASH, 66 MHz, MICROCONTROLLER, PQFP176 |
| 封裝： | PLASTIC, LQFP-176 |
| 文件頁數(shù)： | 69/114頁 |
| 文件大小： | 852K |
| 代理商： | SAK-TC1762-128F66HL |
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TC1762
Functional Description
Preliminary
Data Sheet
54
V1.0, 2008-04
3.16
Watchdog Timer
The WDT provides a highly reliable and secure way to detect and recover from software
or hardware failure. The WDT helps to abort an accidental malfunction of the TC1762 in
a user-specified time period. When enabled, the WDT will cause the TC1762 system to
be reset if the WDT is not serviced within a user-programmable time period. The CPU
must service the WDT within this time interval to prevent the WDT from causing a
TC1762 system reset. Hence, routine service of the WDT confirms that the system is
functioning as expected.
In addition to this standard “Watchdog” function, the WDT incorporates the End-of-
Initialization (Endinit) feature and monitors its modifications. A system-wide line is
connected to the WDT_CON0.ENDINIT bit, serving as an additional write-protection for
critical registers (besides Supervisor Mode protection). Registers protected via this line
can only be modified when Supervisor Mode is active and bit ENDINIT = 0.
A further enhancement in the TC1762’s WDT is its reset prewarning operation. Instead
of resetting the device upon the detection of an error immediately (the way that standard
Watchdogs do), the WDT first issues a Non-Maskable Interrupt (NMI) to the CPU before
resetting the device at a specified time period later. This step gives the CPU a chance to
save the system state to the memory for later investigation of the cause of the
malfunction; an important aid in debugging.
Features
16-bit Watchdog counter
Selectable input frequency:
f
SYS/256 or fSYS/16384
16-bit user-definable reload value for normal Watchdog operation, fixed reload value
for Time-Out and Prewarning Modes
Incorporation of the ENDINIT bit and monitoring of its modifications
Sophisticated Password Access mechanism with fixed and user-definable password
fields
Proper access always requires two write accesses. The time between the two
accesses is monitored by the WDT and is limited.
Access Error Detection: Invalid password (during first access) or invalid guard bits
(during second access) trigger the Watchdog reset generation
Overflow Error Detection: An overflow of the counter triggers the Watchdog reset
generation.
Watchdog function can be disabled; access protection and ENDINIT monitor function
remain enabled.
Double Reset Detection: If a Watchdog induced reset occurs twice, a severe system
malfunction is assumed and the TC1762 is held in reset until a power-on or hardware
reset occurs. This prevents the device from being periodically reset if, for instance,
connection to the external memory has been lost such that system initialization could
not even be performed.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAK-TC1762-128F66HL AC | 功能描述:32位微控制器 - MCU 32 BIT SNGL-CHIP 3.3V 66MHz Flash RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
| SAK-TC1762-128F80HL | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:SK-TC176x Family Starter Kit |
| SAK-TC1762-128F80HL AC | 功能描述:32位微控制器 - MCU 32 BIT SNGL-CHIP 3.3V 80MHz Flash RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
| SAK-TC1762-128F80HLAC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Infineon Technologies AG 功能描述: |
| SAK-TC1764-128F80HL | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:SK-TC176x Family Starter Kit |
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