參數(shù)資料
型號(hào)： MB90F387S
廠商： Fujitsu Limited
英文描述： 16-bit Proprietary Microcontroller CMOS
中文描述： 16位微控制器專有的CMOS
文件頁數(shù)： 32/82頁
文件大?。?/td> 359K
代理商： MB90F387S
MB90385 Series
32
3.
Watchdog Timer
The watchdog timer is a 2-bit counter that uses time-base timer or clock timer as count clock. If the counter is
not cleared within an interval time, CPU is reset.
Watchdog timer functions
The watchdog timer is a timer counter that prevents runaway of a program. Once a watchdog timer is activated,
the counter of watchdog timer must always be cleared within a specified time of interval. If specified interval
time elapses without clearing the counter of a watchdog timer, CPU resetting occurs. This is the function of a
watchdog timer.
The interval time of a watchdog timer is determined by a clock cycle, which is input as a count clock. Watchdog
resetting occurs between a minimum time and a maximum time specified.
The output target of a clock source is specified by the watchdog clock selection bit (WTC: WDCS) in the clock
timer control register.
Interval time of a watchdog timer is specified by the time-base timer output selection bit/clock timer output
selection bit (WDTC: WT1, WT0) in the watchdog timer control register.
Interval timer of watchdog timer
Min
HCLK: Oscillation clock ( 4 MHz) , CSCLK: Sub clock (8.192 kHz)
Notes:
If the time-base timer is cleared when watchdog timer count clock is used as time base timer output
(carry-over signal), watchdog reset time may become longer.
When using the sub clock as machine clock, be sure to specify watchdog timer clock source selection bit
(WDCS) in clock timer control register (WTC) at “0,” selecting output of clock timer.
Max
Clock cycle
2
14
±
2
11
/HCLK
2
16
±
2
13
/HCLK
2
18
±
2
15
/HCLK
2
21
±
2
18
/HCLK
Min
Max
Clock cycle
2
12
±
2
9
/SCLK
2
15
±
2
12
/SCLK
2
16
±
2
13
/SCLK
2
17
±
2
14
/SCLK
Approx. 3.58 ms
Approx. 4.61 ms
Approx. 0.457 s Approx. 0.576 s
Approx. 14.33 ms Approx. 18.3 ms
Approx. 3.584 s Approx. 4.608 s
Approx. 57.23 ms Approx. 73.73 ms
Approx. 7.168 s Approx. 9.216 s
Approx.
458.75 ms
Approx.
589.82 ms
Approx.
14.336 s
Approx.
18.432 s
相關(guān)PDF資料
PDF描述
MB90F387SPMT 16-bit Proprietary Microcontroller CMOS
MB90F385 16-bit Proprietary Microcontroller
MB90F394HAPMT 16-bit Proprietary Microcontroller
MB90F394H 16-bit Proprietary Microcontroller CMOS
MB90F394HPMT 16-bit Proprietary Microcontroller CMOS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB90F387SPMCR-GE1 制造商:FUJITSU 功能描述:
MB90F387SPMCR-G-JNE1 制造商:FUJITSU 功能描述:
MB90F387SPMCRGSE1 制造商:FUJITSU 功能描述:Pb Free
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MB90F387SPMT-GSE1 功能描述:IC MCU FLASH 64K ROM 48LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:F²MC MB90385 產(chǎn)品培訓(xùn)模塊:MCU Product Line Introduction XMEGA Introduction AVR XMEGA USB Connectivity 標(biāo)準(zhǔn)包裝:90 系列:AVR® XMEGA 核心處理器:AVR 芯體尺寸:8/16-位 速度:32MHz 連通性:I²C，IrDA，SPI，UART/USART 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，DMA，POR，PWM，WDT 輸入/輸出數(shù):50 程序存儲(chǔ)器容量:192KB（96K x 16） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:4K x 8 RAM 容量:16K x 8 電壓 - 電源 (Vcc/Vdd):1.6 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 16x12b; D/A 2x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:64-TQFP 包裝:托盤 配用:ATSTK600-RC14-ND - STK600 SOCKET/ADAPTER 64TQFPATSTK600-TQFP64-ND - STK600 SOCKET/ADAPTER 64-TQFPATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMRATAVRISP2-ND - PROGRAMMER AVR IN SYSTEM
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