參數(shù)資料
型號： SAF-XC886C-6FFA
廠商： INFINEON TECHNOLOGIES AG
元件分類： 8位微控制器
英文描述： 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述： 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù)： 76/119頁
文件大?。?/td> 895K
代理商： SAF-XC886C-6FFA
XC886/888CLM
Functional Description
Data Sheet
Prelimary
72
V0.1, 2006-02
If the WDT is not serviced before the timer overflow, a system malfunction is assumed.
As a result, the WDT NMI is triggered (assert WDTTO) and the reset prewarning is
entered. The prewarning period lasts for 30
H
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 0000
H
to the value obtained from the concatenation of WDTWINB and
00
H
.
After being serviced, the WDT continues counting up from the value (<WDTREL> * 2
8
).
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 f
PCLK
/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:
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 30
. This period can be calculated using the same formula by
replacing WDTREL with WDTWINB. For this feature to be useful, WDTWINB should not
be smaller than WDTREL.
Figure 30
WDT Timing Diagram
P
WDT
1
2
WDTIN
+
6
×
(
)
2
16
f
PCLK
WDTREL
–
2
8
×
(
)
×
=
WDTREL
WDTWINB
time
Count
FFFF
H
No refresh
allowed
Refresh allowed
相關PDF資料
PDF描述
SAF-XC886C-6FFI 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
SAF-XC886C-8FFA 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
SAF-XC886C-8FFI 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
SAF-XC886CLM-6FFA 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
SAF-XC886CLM-6FFI 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
相關代理商/技術(shù)參數(shù)
參數(shù)描述
SAF-XC886C-6FFA 5V AC 功能描述:8位微控制器 -MCU MICROCONTROLLER 8-BIT RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
SAF-XC886C-6FFA5VAC 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
SAF-XC886C-6FFI 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit Single-Chip Microcontroller
SAF-XC886C-6FFI 3V3 制造商:Infineon Technologies AG 功能描述:
SAF-XC886C-6FFI 3V3 AC 功能描述:8位微控制器 -MCU MICROCONTROLLER 8-BIT RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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