参数资料
型号: XE8806AMI026TLF
厂商: Semtech
文件页数: 77/143页
文件大小: 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
标准包装: 1
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-TQFP
包装: 剪切带 (CT)
供应商设备封装: 32-TQFP(7x7)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名称: XE8806AMI026CT
Semtech 2006
www.semtech.com
6-6
XE8806A/XE8807A
In assembler code, the sequence to clear the watchdog is:
move AddrRegSysWd, #0x0A
move AddrRegSysWd, #0x03
Only writing Hx0A followed by Hx03 resets the WD. If some other write instruction is done to the RegSysWd
between the writing of the Hx0A and Hx03 values, the watchdog timer will not be cleared.
It is possible to read the status of the watchdog in the RegSysWd register. The watchdog is a 4 bit counter with a
count range between 0 and 7. The system reset is generated when the counter is reaching the value 8.
6.9
Start-up and watchdog specifications
At start-up of the circuit, the POR block generates a reset signal during tPOR. The circuit starts software execution
after this period (see system chapter). The POR is intended to force the circuit into a correct state at start-up. For
precise monitoring of the supply voltage, the voltage level detector (VLD) has to be used.
Symbol
Parameter
Min
Typ
Max
Unit
Comments
TPOR
POR reset duration
5
20
ms
Vbat_sl
Supply ramp up
0.5
V/ms
1
WDtime
Watchdog timeout period
2
s
2
Table 6. Electrical and timing specifications
Note: 1) The Vbat_sl defines the minimum slope required on VBAT. Correct start-up of the circuit is not guaranteed
if this slope is too slow. In such a case, a delay has to be built using the NRESET pin.
Note: 2) The minimal watchdog timeout period is guaranteed when the internal oscillators are used. In case an
external clock source is used, the watchdog timeout period will be correct in so far the contents of the
RegSysRCTrim1 and RegSysRCTrim2 registers are correct (see clock block documentation for more details).
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XE8806ARI026LF 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
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XE8807AMI026TLF 功能描述:IC MCU LOW PWR MTP FLASH 32-TQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器 - 特定应用 系列:XE880x 产品变化通告:Product Discontinuation 26/Aug/2009 标准包装:250 系列:- 应用:网络处理器 核心处理器:4Kc 程序存储器类型:- 控制器系列:- RAM 容量:16K x 8 接口:以太网,UART,USB 输入/输出数:- 电源电压:1.8V, 3.3V 工作温度:- 安装类型:表面贴装 封装/外壳:208-LQFP 包装:带卷 (TR) 供应商设备封装:PG-LQFP-208 其它名称:SP000314382