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| 型号： | SAF-XC2387-72F66L |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP144 |
| 封装： | GREEN, PLASTIC, LQFP-144 |
| 文件页数： | 84/120页 |
| 文件大小： | 1432K |
| 代理商： | SAF-XC2387-72F66L |
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XC2387
XC2000 Family Derivatives
Functional Description
Data Sheet
64
V2.1, 2008-08
3.13
Watchdog Timer
The Watchdog Timer is one of the fail-safe mechanisms which have been implemented
to prevent the controller from malfunctioning for longer periods of time.
The Watchdog Timer is always enabled after an application reset of the chip. It can be
disabled and enabled at any time by executing the instructions DISWDT and ENWDT
respectively. The software has to service the Watchdog Timer before it overflows. If this
is not the case because of a hardware or software failure, the Watchdog Timer
overflows, generating a prewarning interrupt and then a reset request.
The Watchdog Timer is a 16-bit timer clocked with the system clock divided by 16,384
or 256. The Watchdog Timer register is set to a prespecified reload value (stored in
WDTREL) in order to allow further variation of the monitored time interval. Each time it
is serviced by the application software, the Watchdog Timer is reloaded and the
prescaler is cleared.
Time intervals between 3.2
s and 13.4 s can be monitored (@ 80 MHz).
The default Watchdog Timer interval after power-up is 6.5 ms (@ 10 MHz).
3.14
Clock Generation
The Clock Generation Unit can generate the system clock signal
f
SYS for the XC2387
from a number of external or internal clock sources:
External clock signals with pad or core voltage levels
External crystal using the on-chip oscillator
On-chip clock source for operation without crystal
Wake-up clock (ultra-low-power) to further reduce power consumption
The programmable on-chip PLL with multiple prescalers generates a clock signal for
maximum system performance from standard crystals or from the on-chip clock source.
See also Section 4.6.2.
The Oscillator Watchdog (OWD) generates an interrupt if the crystal oscillator frequency
falls below a certain limit or stops completely. In this case, the system can be supplied
with an emergency clock to enable operation even after an external clock failure.
All available clock signals can be output on one of two selectable pins.
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| SAF-XC2786X-96F66L66 | 32-BIT, FLASH, MICROCONTROLLER, PQFP144 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SAF-XC2387-72F66L AC | 功能描述:IC MCU 16BIT FLASH 144-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:XC23xx 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:260 系列:73S12xx 核心处理器:80515 芯体尺寸:8-位 速度:24MHz 连通性:I²C，智能卡，UART/USART，USB 外围设备:LED，POR，WDT 输入/输出数:9 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-VFQFN 裸露焊盘 包装:管件 |
| SAF-XC2387-72F66LAC | 功能描述:16位微控制器 - MCU 16 BIT FLASH RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT |
| SAF-XC2766X-96F66L66 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16/32-Bit Single-Chip Microcontroller with 32-Bit Performance |
| SAF-XC2786X-96F66L | 制造商:Infineon Technologies AG 功能描述: |
| SAF-XC822-1FRA | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit Single-Chip Microcontroller |
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