收藏本站
参数资料
型号： MC68L11D0FNE2
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44
封装： PLASTIC, LCC-44
文件页数： 82/138页
文件大小： 1047K
代理商： MC68L11D0FNE2
Resets, Interrupts, and Low-Power Modes
MC68HC711D3 Data Sheet, Rev. 2.1
48
Freescale Semiconductor
The sequence for resetting the watchdog timer is:
1.
Write $55 to the COP reset register (COPRST) to arm the COP timer clearing mechanism.
2.
Write $AA to the COPRST register to clear the COP timer
Both writes must occur in this sequence prior to the timeout, but any number of instructions can be
executed between the two writes.
4.2.4 Clock Monitor Reset
The MCU contains a clock monitor circuit that measures the E-clock frequency. If the E-clock input rate
is above approximately 200 kHz, then the clock monitor does not generate an MCU reset. If the E-clock
signal is lost or its frequency falls below 10 kHz, then an MCU reset can be generated, and the RESET
pin is driven low to reset the external system.
4.2.5 System Configuration Options Register
The system configuration options register (OPTION) is a special-purpose register with several
time-protected bits. OPTION is used during initialization to configure internal system options.
Bits 5, 4, 2, 1, and 0 can be written only once during the first 64 E-clock cycles after reset in normal modes
(where the HPRIO register bit (SMOD) is cleared). In special modes (where SMOD = 1), the bits can be
written at any time. Bit 3 can be written at anytime.
Table 4-1. COP Time Out Periods
CR0 CR1
E
÷ 215
Divided
By
XTAL = 223
Time Out
–0/+15.6 ms
XTAL =
8.0 MHz
Time Out
–0/+16.4 ms
XTAL =
4.9152 MHz
Time Out
–0/+26.7 ms
XTAL =
4.0 MHz
Time Out
–0/+32.8 ms
XTAL =
3.6864 MHz
Time Out
–0/+35.6 ms
0
1
15.625 ms
16.384 ms
26.667 ms
32.768 ms
35.556 ms
0
1
4
62.5 ms
65.536 ms
106.67 ms
131.07 ms
142.22 ms
1
0
16
250 ms
262.14 ms
426.67 ms
524.29 ms
568.89 ms
1
64
1 sec
1.049 sec
1.707 sec
2.1 sec
2.276 ms
E =
2.1 MHz
2.0 MHz
1.2288 MHz
1.0 MHz
921.6 kHz
Address:
$003A
Bit 7
654321
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
00000000
Figure 4-1. Arm/Reset COP Timer Circuitry Register (COPRST)
相关PDF资料
PDF描述
MC908GR60AVFAR2 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP48
MC908GZ48VFAE 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP48
MC908GZ60CFJE 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP32
MC9S08RE16FGE 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
MC9S12C96CPBR2 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP52
相关代理商/技术参数
参数描述
MC68L11E0FN2 制造商:Rochester Electronics LLC 功能描述:8-BIT MCU,512RAM,A/D,LVDC - Bulk
MC68L11E0FNE2 功能描述:IC MCU 8BIT LV 512RAM 52-PLCC RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 标准包装:1 系列:87C 核心处理器:MCS 51 芯体尺寸:8-位 速度:16MHz 连通性:SIO 外围设备:- 输入/输出数:32 程序存储器容量:8KB（8K x 8） 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4 V ~ 6 V 数据转换器:- 振荡器型:外部 工作温度:0°C ~ 70°C 封装/外壳:44-DIP 包装:管件 其它名称:864285
MC68L11E1CFNE2 功能描述:8位微控制器 -MCU 8B MCU RAM EE A/D LVDC 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
MC68L11E1FNE2 功能描述:8位微控制器 -MCU 8B MCU RAM EE A/D LVD 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
MC68L11F1CFNE3 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512BYTES 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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*