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参数资料
| 型号： | R5F21276SDXXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP32 |
| 封装： | 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32 |
| 文件页数： | 22/52页 |
| 文件大小： | 620K |
| 代理商： | R5F21276SDXXXFP |
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46
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
Figure 11-5. Brown-out reset during operation.
11.2.4
Watchdog Reset
When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On the falling edge of
this pulse, the delay timer starts counting the Time-out period t
TOUT. Refer to page 47 for details on operation of the
Watchdog Timer.
Figure 11-6. Watchdog Reset during operation.
11.3
Internal voltage reference
Atmel ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P features an internal bandgap
reference. This reference is used for Brown-out Detection, and it can be used as an input to the Analog Compara-
tor or the ADC.
11.3.1
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 ”System and Reset characteristics” on page 297. To save power, the reference is not always turned on. The ref-
erence is on during the following situations:
1.
When the BOD is enabled (by programming the BODLEVEL [2...0] Fuse).
2.
When the bandgap reference is connected to the Analog Comparator (by setting the ACBG bit in ACSR).
3.
When the ADC is enabled.
Thus, when the BOD is not enabled, after setting the ACBG bit or enabling the ADC, the user must always allow
the reference to start up before the output from the Analog Comparator or ADC is used. To reduce power con-
sumption in Power-down mode, the user can avoid the three conditions above to ensure that the reference is
turned off before entering Power-down mode.
VCC
RESET
TIME-OUT
INTERNAL
RESET
VBOT-
VBOT+
tTOUT
CK
CC
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R5F21276SNFP | 制造商:Renesas Electronics 功能描述:16 R8C/2x 20MHz 32LQFP 32KB Tray 制造商:Renesas Electronics Corporation 功能描述:Microcontroller,R8C/27,ROM34K |
| R5F21276SNFP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-Bit R8C CISC 32KB Flash 3.3V/5V 32-Pin LQFP Tray 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 32KB FLASH 3.3V/5V 32LQFP - Trays 制造商:Renesas Electronics 功能描述:16 R8C / Tiny 20MHz 32LQFP Bulk 制造商:Renesas Electronics Corporation 功能描述:IC R8C/27 MCU FLASH 32LQFP 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT R8C/27 32LQFP 制造商:Renesas Electronics Corporation 功能描述:IC, MCU, 16BIT, R8C/27, 32LQFP 制造商:Renesas Electronics Corporation 功能描述:R8C Series 16 bit 1.5 kB RAM 32 kB Flash Single Chip Microcontroller SMT-LQFP-32 制造商:Renesas Electronics Corporation 功能描述:IC 16BIT MCU M16C/R8C/TINY 20MHZ LQFP-32; Controller Family/Series:R8C/2x; Core Size:16bit; No. of I/O's:25; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Digital IC Case Style:LQFP; No. of Pins:32; Program Memory Size:32KB ;RoHS Compliant: Yes 制造商:Renesas 功能描述:MCU 16-Bit R8C CISC 32KB Flash 3.3V/5V 32-Pin LQFP Tray |
| R5F21276SNFP#V2 | 功能描述:IC R8C/27 MCU FLASH 32LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/2x/27 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| R5F21276SNFP#W4 | 功能描述:MCU 32KB ROM 1.5KB RAM 32-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/2x/27 标准包装:300 系列:78K0R/Ix3 核心处理器:78K/0R 芯体尺寸:16-位 速度:40MHz 连通性:3 线 SIO，I²C，LIN，UART/USART 外围设备:DMA，LVD，POR，PWM，WDT 输入/输出数:27 程序存储器容量:16KB（16K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:1K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:38-SSOP 包装:托盘 |
| R5F21276SNFP#W6 | 制造商:Renesas Electronics Corporation 功能描述: |
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