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参数资料
| 型号： | R5F21272SNFP |
| 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： | 34/52页 |
| 文件大小： | 620K |
| 代理商： | R5F21272SNFP |
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57
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
13. External interrupts
The External Interrupts are triggered by the INT0 pin or any of the PCINT30:0 pins
(2). Observe that, if enabled, the
interrupts will trigger even if the INT0 or PCINT30:0 pins are configured as outputs. This feature provides a way of
generating a software interrupt. The pin change interrupt PCI1 will trigger if any enabled PCINT15:8 pin toggles.
Pin change interrupts PCI0 will trigger if any enabled PCINT7:0 pin toggles. The PCMSK3
PCMSK1, and PCMSK0 Registers control which pins contribute to the pin change interrupts. Pin change interrupts
on PCINT30:0 are detected asynchronously. This implies that these interrupts can be used for waking the part also
from sleep modes other than Idle mode.
The INT0 interrupts can be triggered by a falling or rising edge or a low level. This is set up as indicated in the
specification for the ”EICRA – External Interrupt Control Register A” on page 58. When the INT0 interrupt is
enabled and is configured as level triggered, the interrupt will trigger as long as the pin is held low. . Note that rec-
ognition of falling or rising edge interrupts on INT0 requires the presence of an I/O clock, described in ”Clock
systems and their distribution” on page 27. Low level interrupt on INT0 is detected asynchronously. This implies
that this interrupt can be used for waking the part also from sleep modes other than Idle mode. The I/O clock is
halted in all sleep modes except Idle mode.
Note that if a level triggered interrupt is used for wake-up from Power-down, the required level must be held long
enough for the MCU to complete the wake-up to trigger the level interrupt. If the level disappears before the end of
the Start-up Time, the MCU will still wake up, but no interrupt will be generated. The start-up time is defined by the
SUT and CKSEL Fuses as described in ”System clock and clock options” on page 27.
Notes:
1. PCMSK3 and PCMSK2 are only present in Atmel ATmega3250A/3250PA/6450A/6450P.
2. PCINT30:16 are only present in ATmega3250A/3250PA/6450A/6450P. Only PCINT15:0 are present in Atmel
ATmega165A/165PA; ATmega325A/325PA and ATmega645A/645P. See ”Pin configurations” on page 2 and ”Reg-
ister description” on page 58 for details.
13.1
Pin change interrupt timing
An example of timing of a pin change interrupt is shown in Figure 13-1 on page 57.
Figure 13-1. Pin change interrupt.
clk
PCINT(n)
pin_lat
pin_sync
pcint_in_(n)
pcint_syn
pcint_setflag
PCIF
PCINT(0)
pin_sync
pcint_syn
pin_lat
D
Q
LE
pcint_setflag
PCIF
clk
PCINT(0) in PCMSK(x)
pcint_in_(0)
0
x
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R5F21272SNFP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-Bit R8C CISC 8KB Flash 3.3V/5V 32-Pin LQFP Tray 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 8KB FLASH 3.3V/5V 32LQFP - Trays 制造商:Renesas Electronics Corporation 功能描述:IC R8C/27 MCU FLASH 32LQFP |
| R5F21272SNFP#V0 | 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) |
| R5F21272SNFP#V2 | 功能描述:MCU 8KB ROM 512B 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: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) |
| R5F21272SNFP#W4 | 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V 8+2K PB-FREE 32-LQFP T&R - Tape and Reel |
| R5F21272SNFP#X6 | 功能描述:MCU 8KB ROM 512B 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 |
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