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参数资料
型号： SAF-XE167HM-48FXXL
厂商： INFINEON TECHNOLOGIES AG
元件分类： 微控制器/微处理器
英文描述： RISC MICROCONTROLLER, PQFP144
封装： 0.50 MM PITCH, GREEN, PLASTIC, LQFP-144
文件页数： 118/140页
文件大小： 1096K
代理商： SAF-XE167HM-48FXXL
XE167FM, XE167GM, XE167HM, XE167KM
XE166 Family Derivatives / Base Line
Functional Description
Data Sheet
79
V2.0, 2009-03
3.16
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
μs and 13.4 s can be monitored (@ 80 MHz).
The default Watchdog Timer interval after power-up is 6.5 ms (@ 10 MHz).
3.17
Clock Generation
The Clock Generation Unit can generate the system clock signal
f
SYS for the XE167xM
from a number of external or internal clock sources:
External clock signals with pad voltage or core voltage levels
External crystal or resonator using the on-chip oscillator
On-chip clock source for operation without crystal/resonator
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, a clock input signal, 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.
相关PDF资料
PDF描述
SAF-XE167HM-72FXXL RISC MICROCONTROLLER, PQFP144
SAF-XE167KM-48FXXL RISC MICROCONTROLLER, PQFP144
SAF-XE167KM-72FXXL RISC MICROCONTROLLER, PQFP144
SAK-XE167FM-48FXXL RISC MICROCONTROLLER, PQFP144
SAK-XE167FM-72FXXL 32-BIT, FLASH, RISC MICROCONTROLLER, PQFP144
相关代理商/技术参数
参数描述
SAF-XE167HM-72F80L AA 功能描述:16位微控制器 - MCU 16 BIT FLASH C11 IMM 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-XE167K-48F66L 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bit Single-Chip Real Time Signal Controller
SAF-XE167K-48F66L AC 功能描述:16位微控制器 - MCU Integrated Circuits (ICs) Microcontrollers 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-XE167K-48F66LAC 制造商:Rochester Electronics LLC 功能描述: 制造商:Infineon Technologies AG 功能描述:
SAF-XE167K-72F66L 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:16-Bit Single-Chip Real Time Signal Controller
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