- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69305 > R5F21274JFP 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 PDF資料下載
參數(shù)資料
| 型號： | R5F21274JFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
| 封裝： | 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32 |
| 文件頁數(shù)： | 21/52頁 |
| 文件大?。?/td> | 620K |
| 代理商： | R5F21274JFP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁
45
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
Figure 11-3. MCU start-up, RESET extended externally.
11.2.2
External Reset
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the minimum pulse
width (see ”System and Reset characteristics” on page 297) will generate a reset, even if the clock is not running.
Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the Reset Threshold Volt-
age – V
RST – on its positive edge, the delay counter starts the MCU after the Time-out period – tTOUT – has expired.
Figure 11-4. External reset during operation.
11.2.3
Brown-out detection
Atmel ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P has an On-chip Brown-out
Detection (BOD) circuit for monitoring the V
CC level during operation by comparing it to a fixed trigger level. The
trigger level for the BOD can be selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure
spike free Brown-out Detection. The hysteresis on the detection level should be interpreted as V
BOT+ = VBOT +
V
HYST/2 and VBOT- = VBOT - VHYST/2.When the BOD is enabled, and VCC decreases to a value below the trigger level
(V
BOT- in Figure 11-5), the Brown-out Reset is immediately activated. When VCC increases above the trigger level
(V
The BOD circuit will only detect a drop in V
CC if the voltage stays below the trigger level for longer than tBOD given
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
VCC
CC
相關PDF資料 |
PDF描述 |
|---|---|
| R5F21264SNXXXFP | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
| R5F21265SNXXXFP | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
| R5F21272SNFP | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
| R5F21264KXXXFP | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
| R5F21264JFP | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| R5F21274JFP#U0 | 功能描述:MCU FLASH 2K FLASH 16K 32LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/2x/27 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| R5F21274JFP#W4 | 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V - Tape and Reel |
| R5F21274JXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MCU |
| R5F21274KFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES |
| R5F21274KXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MCU |
發(fā)布緊急采購，3分鐘左右您將得到回復。