- 您现在的位置：买卖IC网 > PDF目录136905 > TSC87C52-20IAD (ATMEL CORP) 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PDIP40 PDF资料下载
参数资料
| 型号： | TSC87C52-20IAD |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 27/46页 |
| 文件大小： | 4720K |
| 代理商： | TSC87C52-20IAD |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页
32
ATtiny20 [DATASHEET]
8235E–AVR–03/2013
Figure 8-7.
Watchdog Timer
The Wathdog Timer can also be configured to generate an interrupt instead of a reset. This can be very helpful when
using the Watchdog to wake-up from Power-down.
To prevent unintentional disabling of the Watchdog or unintentional change of time-out period, two different safety levels
are selected by the fuse WDTON as shown in Table 8-1 on page 32. See “Procedure for Changing the Watchdog Timer
Configuration” on page 32 for details.
Table 8-1.
WDT Configuration as a Function of the Fuse Settings of WDTON
8.4.1
Procedure for Changing the Watchdog Timer Configuration
The sequence for changing configuration differs between the two safety levels, as follows:
8.4.1.1 Safety Level 1
In this mode, the Watchdog Timer is initially disabled, but can be enabled by writing the WDE bit to one without any
restriction. A special sequence is needed when disabling an enabled Watchdog Timer. To disable an enabled Watchdog
Timer, the following procedure must be followed:
1.
Write the signature for change enable of protected I/O registers to register CCP
2.
Within four instruction cycles, in the same operation, write WDE and WDP bits
8.4.1.2 Safety Level 2
In this mode, the Watchdog Timer is always enabled, and the WDE bit will always read as one. A protected change is
needed when changing the Watchdog Time-out period. To change the Watchdog Time-out, the following procedure must
be followed:
1.
Write the signature for change enable of protected I/O registers to register CCP
2.
Within four instruction cycles, write the WDP bit. The value written to WDE is irrelevant
WDTON
Safety Level
Initial State
How to Disable
How to Change Time-out
Unprogrammed
1
Disabled
Protected change sequence
No limitations
Programmed
2
Enabled
Always enabled
Protected change sequence
OSC/2K
OSC/4K
OSC/8K
OSC/16K
OSC/32K
OSC/64K
OSC/128K
OSC/256K
OSC/512K
OSC/1024K
MCU RESET
WATCHDOG
PRESCALER
128 kHz
OSCILLATOR
WATCHDOG
RESET
WDP0
WDP1
WDP2
WDP3
WDE
MUX
相关PDF资料 |
PDF描述 |
|---|---|
| TSC87C52-25AKB | 8-BIT, UVPROM, 25 MHz, MICROCONTROLLER, CQCC44 |
| TSC80C31-20MXR | 8-BIT, 20 MHz, MICROCONTROLLER, UUC40 |
| TSC80C31-25MWB/883 | 8-BIT, 25 MHz, MICROCONTROLLER, UUC40 |
| TSC80C51-12MXR | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, UUC40 |
| TSC80C51-20MWR/883 | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, UUC40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TSC888AILT | 功能描述:电流灵敏放大器 Sense Amplifier 20 Gain RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| TSC888BILT | 功能描述:电流灵敏放大器 Sense Amplifier 50 Gain RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| TSC888CILT | 功能描述:电流灵敏放大器 Sense Amplifier 100 Gain RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| TSC9 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EURO TERMINAL BLOCKS |
| TSC903 | 制造商:Laird Technologies Inc 功能描述:CLIP TO-3P 制造商:Laird Technologies Inc 功能描述:CLIP, TO-3P 制造商:Laird Technologies Inc 功能描述:CLIP, TO-3P; External Width:6.5mm; SVHC:No SVHC (18-Jun-2012); Isolation Voltage:1kV; Length:30mm; Material:Steel; Package / Case:TO-3P, TO-218, TO-247; Packages Cooled:TO-3P, TO-218, TO-247; Pad Thickness Max:0.5mm; Panel Thickness ;RoHS Compliant: Yes 制造商:Laird Technologies Inc 功能描述:CLIP, TO-3P; External Width:6.5mm; SVHC:No SVHC (18-Jun-2012); Isolation Voltage:1kV; Length:30mm; Material:Steel; Package / Case:TO-3P, TO-218, TO-247; Packages Cooled:TO-218, TO-247, TO-3P; Pad Thickness Max:0.5mm; Panel Thickness ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。