参数资料
型号: COP8CBR9LVA8
厂商: National Semiconductor
文件页数: 36/111页
文件大小: 0K
描述: IC MCU EEPROM 8BIT 32K 68PLCC
标准包装: 18
系列: COP8™ 8C
核心处理器: COP8
芯体尺寸: 8-位
速度: 20MHz
连通性: Microwire/Plus(SPI),UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 59
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
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 16x10b
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: 管件
其它名称: *COP8CBR9LVA8
SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
5.8.1
Oscillator
CKI is the clock input while G7/CKO is the clock generator output to the crystal. An on-chip bias resistor
connected between CKI and CKO is provided to reduce system part count. The value of the resistor is in
the range of 0.5M to 2M (typically 1.0M). Table 5-1 shows the component values required for various
standard crystal values. Resistor R2 is on-chip, for the high speed oscillator, and is shown for reference.
Figure 5-6 and Figure 5-6 shows the crystal oscillator connection diagrams. A ceramic resonator of the
required frequency may be used in place of a crystal if the accuracy requirements are not quite as strict.
High Speed Oscillator
Low Speed Oscillator
Figure 5-6. Crystal Oscillator
Table 5-1. Crystal Oscillator Configuration, TA = 25°C, VCC = 5V
(1)
CKI Freq.
R1 (k
Ω)
R2 (M
Ω)
C1 (pF)
C2 (pF)
(MHz)
0
On Chip
18
10
0
On Chip
18
5
0
On Chip
18–36
1
5.6
On Chip
100
100–156
0.455
0
20
**
32.768 kHz*
(1)
*Applies to connection to low speed oscillator on port pins L0 and L1 only.
**See Note below.
The crystal and other oscillator components should be placed in close proximity to the CKI and CKO pins
to minimize printed circuit trace length.
The values for the external capacitors should be chosen to obtain the manufacturer's specified load
capacitance for the crystal when combined with the parasitic capacitance of the trace, socket, and
package (which can vary from 0 to 8 pF). The guideline in choosing these capacitors is:
Manufacturer's specified load cap = (C1 * C2) / (C1 + C2) + Cparasitic
C2 can be trimmed to obtain the desired frequency. C2 should be less than or equal to C1.
NOTE
The low power design of the low speed oscillator makes it extremely sensitive to board
layout and load capacitance. The user should place the crystal and load capacitors within
1cm. of the device and must ensure that the above equation for load capacitance is strictly
followed. If these conditions are not met, the application may have problems with startup of
the low speed oscillator.
30
Functional Description
Copyright 2000–2013, Texas Instruments Incorporated
Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9
相关PDF资料
PDF描述
1588128-3 INSERT ASSY MINI EB SM 4 CHAN
1828700-3 CABLE ADAPTER KIT, PLUG, 6 MM
1828700-1 CABLE ADAPTER KIT, PLUG, 5 MM
1918931-1 CABLE ADPT, PLUG, HA, 3.2 MM
1918025-1 PROTECT COV ASSY, RECPT JAM-NUT
相关代理商/技术参数
参数描述
COP8CCE9 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset
COP8CCE9HLQ7 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit CMOS Flash Microcontroller with 8k Memory, Virtual EEPROM, 10-Bit A/D and Brownout Reset
COP8CCE9HLQ9 功能描述:IC MCU FLASH 8BIT 8K A/D 44LLP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:COP8™ 8C 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN,SCI,SPI 外围设备:POR,PWM,温度传感器,WDT 输入/输出数:21 程序存储器容量:40KB(20K x 16) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
COP8CCE9HVA7 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
COP8CCE9HVA7/NOPB 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT