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參數(shù)資料
| 型號(hào)： | R5F2L36CCNFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 42/74頁 |
| 文件大?。?/td> | 959K |
| 代理商： | R5F2L36CCNFP |
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48
2588F–AVR–06/2013
ATtiny261/461/861
the next time-out will generate a reset. To avoid the Watchdog Reset, WDIE must be set after
each interrupt.
Bit 4 – WDCE: Watchdog Change Enable
This bit must be set when the WDE bit is written to logic zero. Otherwise, the Watchdog will not
be disabled. Once written to one, hardware will clear this bit after four clock cycles. Refer to the
description of the WDE bit for a Watchdog disable procedure. This bit must also be set when
changing the prescaler bits. See “Timed Sequences for Changing the Configuration of the
Bit 3 – WDE: Watchdog Enable
When the WDE is written to logic one, the Watchdog Timer is enabled, and if the WDE is written
to logic zero, the Watchdog Timer function is disabled. WDE can only be cleared if the WDCE bit
has logic level one. To disable an enabled Watchdog Timer, the following procedure must be
followed:
1.
In the same operation, write a logic one to WDCE and WDE. A logic one must be writ-
ten to WDE even though it is set to one before the disable operation starts.
2.
Within the next four clock cycles, write a logic 0 to WDE. This disables the Watchdog.
In safety level 2, it is not possible to disable the Watchdog Timer, even with the algorithm
described above. See “Timed Sequences for Changing the Configuration of the Watchdog
In safety level 1, WDE is overridden by WDRF in MCUSR. See “MCUSR – MCU Status Regis-
ter” on page 47 for description of WDRF. This means that WDE is always set when WDRF is set.
To clear WDE, WDRF must be cleared before disabling the Watchdog with the procedure
described above. This feature ensures multiple resets during conditions causing failure, and a
safe start-up after the failure.
Note:
If the watchdog timer is not going to be used in the application, it is important to go through a
watchdog disable procedure in the initialization of the device. If the Watchdog is accidentally
enabled, for example by a runaway pointer or brown-out condition, the device will be reset, which
in turn will lead to a new watchdog reset. To avoid this situation, the application software should
always clear the WDRF flag and the WDE control bit in the initialization routine.
Table 8-2.
Watchdog Timer Configuration
WDE
WDIE
Watchdog Timer State
Action on Time-out
0
Stopped
None
0
1
Running
Interrupt
1
0
Running
Reset
1
Running
Interrupt
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| R5F2L36CCNFP#30 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 128KB FLASH 64LQFP 制造商:Renesas Electronics Corporation 功能描述:R8C Series 16 bit 10 kB RAM 128 kB Flash Single Chip Microcontroller SMT-LQFP-64 |
| R5F2L36CCNFP#U0 | 功能描述:MCU 1KB FLASH 128K ROM 64-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/Lx/36C 標(biāo)準(zhǔn)包裝:96 系列:PIC® 16F 核心處理器:PIC 芯體尺寸:8-位 速度:20MHz 連通性:I²C，SPI 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):11 程序存儲(chǔ)器容量:3.5KB（2K x 14） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:128 x 8 電壓 - 電源 (Vcc/Vdd):2.3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 包裝:管件 |
| R5F2L36CCNFP#V2 | 制造商:Renesas Electronics Corporation 功能描述:R8CL36C 128+4KB 1.8/5.5V -20 8 制造商:Renesas Electronics Corporation 功能描述:R8CL36C 128+4KB 1.8/5.5V -20~8 制造商:Renesas Electronics Corporation 功能描述:R8CL36C 128+4KB 1.8/5.5V -20 85C 64LQFP - Trays 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT 128KB FLASH 64LQFP |
| R5F2L36CMDFA#30 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 128KB FLASH 64LQFP |
| R5F2L36CMDFA#V0 | 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 128KB FLASH 64LQFP |
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