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参数资料
| 型号： | R5F21284KSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO20 |
| 封装： | 4.40 X 6.50 MM, 0.65 MM PITCH, PLASTIC, LSSOP-20 |
| 文件页数： | 23/66页 |
| 文件大小： | 599K |
| 代理商： | R5F21284KSP |
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31
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET]
8285E–AVR–02/2013
Notes:
1. These options should only be used when not operating close to the maximum frequency of the device, and only if
frequency stability at start-up is not important for the application. These options are not suitable for XTALs.
2. These options are intended for use with ceramic resonators and will ensure frequency stability at start-up. They can
also be used with XTALs when not operating close to the maximum frequency of the device, and if frequency stabil-
ity at start-up is not important for the application.
9.6
Low-frequency XTAL Oscillator
The Low-frequency XTAL Oscillator is optimized for use with a 32.768kHz watch XTAL. When selecting XTALs,
load capacitance and XTAL’s Equivalent Series Resistance, ESR must be taken into consideration. Both values
ar e
spe c if ie d
by
the
XT AL
v end or .
Atm e l
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P oscillator is optimized for very low
power consumption, and thus when selecting XTALs, see Table 9-7 for maximum ESR recommendations on 9pF
and 6.5pF XTALs.
Note:
1. Maximum ESR is typical value based on characterization.
The low-frequency XTAL oscillator provides an internal load capacitance, see Table 9-9 on page 32 at each TOSC
pin.
ATmega325A/325PA/3250A/3250PA/645A/645P/6450A/6450P oscillator is optimized for very low power con-
sumption, and thus when selecting XTALs, see Table 9-8 on page 31 for maximum ESR recommendations on
6.5 pF, 9.0 pF and 12.5 pF XTALs.
Table 9-8.
Maximum ESR recommendation for 32.768kHz watch XTAL Atmel
ATmega325A/325PA/3250A/3250PA/645A/645P/6450A/6450P.
Note:
1. Maximum ESR is typical value based on characterization.
101
16K CK
14CK
XTAL Oscillator, BOD
enabled
1
10
16K CK
14CK + 4.1ms
XTAL Oscillator, fast rising
power
1
11
16K CK
14CK + 65ms
XTAL Oscillator, slowly
rising power
Table 9-6.
Start-up times for the XTAL oscillator clock selection. (Continued)
CKSEL0
SUT1:0
Start-up time from
power-down and
power-save
Additional delay
from reset
(V
CC = 5.0V)
Recommended usage
Table 9-7.
Maximum ESR recommendation for 32.768kHz watch XTAL ATmega165A/ATmega165PA.
XTAL CL [pF]
Max ESR [k
] (1)
6.5
60
935
XTAL CL [pF]
Max ESR [k
] (1)
6.5
75
9.0
65
12.5
30
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R5F21284KSP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-Bit R8C CISC 16KB Flash 3.3V/5V 20-Pin LSSOP 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 16KB FLASH 3.3V/5V 20PIN LSSOP - Rail/Tube 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 16KB FLASH 20SSOP |
| R5F21284KSP#V0 | 功能描述:IC R8C/28 MCU FLASH 20SSOP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:R8C/2x/28 标准包装:60 系列:PSOC® 3 CY8C38xx 核心处理器:8051 芯体尺寸:8-位 速度:67MHz 连通性:EBI/EMI，I²C，LIN，SPI，UART/USART 外围设备:电容感应，DMA，LCD，POR，PWM，WDT 输入/输出数:25 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:2K x 8 RAM 容量:8K x 8 电压 - 电源 (Vcc/Vdd):1.71 V ~ 5.5 V 数据转换器:A/D 2x20b，D/A 4x8b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:48-VFQFN 裸露焊盘 包装:托盘 |
| R5F21284KXXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES |
| R5F21284SDSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MCU |
| R5F21284SDSP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 16-Bit R8C CISC 16KB Flash 3.3V/5V 20-Pin LSSOP 制造商:Renesas Electronics Corporation 功能描述:MCU 16BIT R8C CISC 16KB FLASH 3.3V/5V 20PIN LSSOP - Rail/Tube 制造商:Renesas Electronics Corporation 功能描述:8BITS FLASH MCU R8C/28 制造商:Renesas Electronics 功能描述:R8C 20MHz 制造商:Renesas Electronics Corporation 功能描述:IC R8C/28 MCU FLASH 20SSOP 制造商:Renesas Electronics Corporation 功能描述:R8C Series 16-bit 1 kB RAM 16 kB Flash 20 MHz Microcontroller - SSOP-20 制造商:Renesas 功能描述:MCU 16-Bit R8C CISC 16KB Flash 3.3V/5V 20-Pin LSSOP |
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