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参数资料
型号： SAX-XC878CM-13FFI5V
厂商： INFINEON TECHNOLOGIES AG
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
封装： PLASTIC, TQFP-64
文件页数： 129/141页
文件大小： 2385K
代理商： SAX-XC878CM-13FFI5V
XC878CLM
Functional Description
Data Sheet
81
V1.1, 2009-08
If the WDT is not serviced before the timer overflow, a system malfunction is assumed.
As a result, the WDT NMI is triggered (assert FNMIWDT) and the reset prewarning is
entered. The prewarning period lasts for 30H count, after which the system is reset
(assert WDTRST).
The WDT has a “programmable window boundary” which disallows any refresh during
the WDT’s count-up. A refresh during this window boundary constitutes an invalid
access to the WDT, causing the reset prewarning to be entered but without triggering the
WDT NMI. The system will still be reset after the prewarning period is over. The window
boundary is from 0000H to the value obtained from the concatenation of WDTWINB and
00H.
After being serviced, the WDT continues counting up from the value (<WDTREL> * 28).
The time period for an overflow of the WDT is programmable in two ways:
The input frequency to the WDT can be selected to be either
f
PCLK/2 or fPCLK/128
The reload value WDTREL for the high byte of WDT can be programmed in register
WDTREL
The period,
P
WDT, between servicing the WDT and the next overflow can be determined
by the following formula:
(3.3)
If the Window-Boundary Refresh feature of the WDT is enabled, the period
P
WDT
between servicing the WDT and the next overflow is shortened if WDTWINB is greater
than WDTREL, see Figure 24. This period can be calculated using the same formula by
replacing WDTREL with WDTWINB. For this feature to be useful, WDTWINB cannot be
smaller than WDTREL.
PWDT
2 1WDTIN
+
6
×
()
216 WDTREL
–
28
×
()
×
fPCLK
------------------------------------------------------------------------------------------------------
=
相关PDF资料
PDF描述
SAX-XC878M-16FFI3V3 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
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相关代理商/技术参数
参数描述
SAX-XC878CM-16FFA 5V AC 功能描述:8位微控制器 -MCU 8-Bit Single-Chip Microcontroller 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
SAX-XC878CM-16FFA5V 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:8-Bit Single-Chip Microcontroller
SAX-XC878CM-16FFA5VAA 功能描述:8位微控制器 -MCU 8 BIT FLASH 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
SAX-XC878L-13FFA 5V AA 功能描述:IC MCU 8BIT FLASH 64-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:XC8xx 标准包装:1,900 系列:XC8xx 核心处理器:XC800 芯体尺寸:8-位 速度:27MHz 连通性:CAN，SPI，SSI，UART/USART 外围设备:欠压检测/复位，POR，PWM，WDT 输入/输出数:40 程序存储器容量:52KB（52K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:3.25K x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 105°C 封装/外壳:64-LQFP 包装:带卷 (TR)
SAX-XC878L-13FFA5VAA 功能描述:8位微控制器 -MCU 8 BIT FLASH 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
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