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参数资料
| 型号： | R5F2L36CCNFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件页数： | 70/74页 |
| 文件大小： | 959K |
| 代理商： | R5F2L36CCNFP |
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73
2588F–AVR–06/2013
ATtiny261/461/861
Figure 11-2.
Prescaler for Timer/Counter0
Note:
1. The synchronization logic on the input pins (
T0) is shown in Figure 11-3.
The prescaled clock has a frequency of f
CLK_I/O/8, fCLK_I/O/64, fCLK_I/O/256, or fCLK_I/O/1024. See
Table 11-4 on page 85 for details.
11.3.1.1
Prescaler Reset
The prescaler is free running, i.e. it operates independently of the Clock Select logic of the
Timer/Counter. Since the prescaler is not affected by the Timer/Counter’s clock select, the state
of the prescaler will have implications for situations where a prescaled clock is used. One exam-
ple of prescaling artifacts occurs when the timer is enabled and clocked by the prescaler (6 >
CSn2:0 > 1). The number of system clock cycles from when the timer is enabled to the first count
occurs can be from 1 to N+1 system clock cycles, where N equals the prescaler divisor (8, 64,
256, or 1024). It is possible to use the Prescaler Reset for synchronizing the Timer/Counter to
program execution.
11.3.2
External Clock Source
An external clock source applied to the T0 pin can be used as Timer/Counter clock (clk
T0). The
T0 pin is sampled once every system clock cycle by the pin synchronization logic. The synchro-
nized (sampled) signal is then passed through the edge detector. Figure 11-3 shows a functional
equivalent block diagram of the T0 synchronization and edge detector logic. The registers are
clocked at the positive edge of the internal system clock (clk
I/O). The latch is transparent in the
high period of the internal system clock.
The edge detector generates one clk
T0 pulse for each positive (CSn2:0 = 7) or negative (CSn2:0
= 6) edge it detects. See Table 11-4 on page 85 for details.
PSR0
Clear
clk
T0
T0
clk
I/O
Synchronization
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相关代理商/技术参数 |
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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 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/Lx/36C 标准包装:96 系列:PIC® 16F 核心处理器:PIC 芯体尺寸:8-位 速度:20MHz 连通性:I²C，SPI 外围设备:欠压检测/复位，POR，PWM，WDT 输入/输出数:11 程序存储器容量:3.5KB（2K x 14） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:128 x 8 电压 - 电源 (Vcc/Vdd):2.3 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 包装: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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