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參數(shù)資料
| 型號： | R5F3650ENFA |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PQFP100 |
| 封裝： | 20 X 14 MM, 0.65 MM PITCH, QFP-100 |
| 文件頁數(shù)： | 32/81頁 |
| 文件大?。?/td> | 879K |
| 代理商： | R5F3650ENFA |
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50
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
Figure 9-6.
Watchdog Reset During Operation
9.0.7
MCU Status Register – MCUSR
The MCU Status Register provides information on which reset source caused an MCU reset.
Bit 3 – WDRF: Watchdog Reset Flag
This bit is set if a Watchdog Reset occurs. The bit is reset by a Power-on Reset, or by writing a
logic zero to the flag.
Bit 2 – BORF: Brown-out Reset Flag
This bit is set if a Brown-out Reset occurs. The bit is reset by a Power-on Reset, or by writing a
logic zero to the flag.
Bit 1 – EXTRF: External Reset Flag
This bit is set if an External Reset occurs. The bit is reset by a Power-on Reset, or by writing a
logic zero to the flag.
Bit 0 – PORF: Power-on Reset Flag
This bit is set if a Power-on Reset occurs. The bit is reset only by writing a logic zero to the flag.
To make use of the Reset flags to identify a reset condition, the user should read and then reset
the MCUSR as early as possible in the program. If the register is cleared before another reset
occurs, the source of the reset can be found by examining the reset flags.
9.1
Internal Voltage Reference
AT90PWM2/2B/3/3B features an internal bandgap reference (1.1V). This reference is used for
Brown-out Detection. A 2.56V voltage reference is generated thanks to the bandgap
, it can be used as
a voltage reference for the DAC and/or the ADC, and can also be used as analog input for the
analog comparators. In order to use the internal Vref, it is necessary to configure it thanks to the
REFS1 and REFS0 bits in the ADMUX register and to set an analog feature which requires it.
9.1.1
Voltage Reference Enable Signals and Start-up Time
The voltage reference has a start-up time that may influence the way it should be used. The
start-up time is given in Table 9-4. To save power, the reference is not always turned on. The
reference is on during the following situations:
CK
CC
Bit
7
65
43
21
0
–
WDRF
BORF
EXTRF
PORF
MCUSR
Read/Write
R
R/W
Initial Value
0
See Bit Description
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| R5F3650ENFB | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS MCU |
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| R5F3650ENFB#U0 | 功能描述:MCU 4KB FLASH 256/16K 100-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:M16C™ M16C/60/65 標準包裝: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 外圍設備:欠壓檢測/復位，POR，PWM，WDT 輸入/輸出數(shù):11 程序存儲器容量:3.5KB（2K x 14） 程序存儲器類型: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 |
| R5F3650KCDFA | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:televisions, household appliances, office equipment, communication devices |
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