參數(shù)資料
型號(hào)： T9000
英文描述： ISDN Network Termination Node (NTN) Device
中文描述： ISDN網(wǎng)絡(luò)終端節(jié)點(diǎn)（新界北）設(shè)備
文件頁數(shù)： 22/126頁
文件大?。?/td> 2127K
代理商： T9000
22
Lucent Technologies Inc.
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
T9000
6 Functional Modules
(continued)
6.8 Watchdog Timer
A watchdog timer is implemented using a 16-bit pre-
scaler clocked by the 80C32 microcontroller clock. The
prescaler drives a programmable up-counter that pro-
vides an additional count multiplication selection and is
programmable from 1 to 127. Upon overflow of the up-
counter, the entire chip is reset (including the 80C32).
Given the 16-bit prescaler (65536 count) and a 1 to 127
multiplication selection, the watchdog time-out ranges
can be calculated as follows:
960 kHz 80C32 clock:
Longest: 1/960 k x 65536 x 127 = 8.670 s
Shortest: 1/960 k x 65536 x 1 = 68.27 ms
15.36 MHz 80C32 clock:
Longest: 1/15.36 M x 65536 x 127 = 541.9 ms
Shortest: 1/15.36 M x 65536 x 1 = 4.267 ms
Note that programming the count multiplication register
to 0 initiates an immediate reset of the chip. This is a
convenient way to get the 80C32 to do a full system
reset.
Table 16 lists the watchdog timer control register bits.
Table 16. WDT: Microcontroller Watchdog Timer Control (0x04)
Reg
WDT
RESET
R/W
R/W
Default
Bit 7
WDTE
0
Bit 6
WDT6
1
Bit 5
WDT5
1
Bit 4
WDT4
1
Bit 3
WDT3
1
Bit 2
WDT2
1
Bit 1
WDT1
1
Bit 0
WDT0
1
Bit #
7
Symbol
WDTE
Name/Description
Watchdog Timer Enable.
Enables the watchdog timer function.
0: Watchdog timer disabled.
1: Watchdog timer enabled.
Watchdog Timer Value.
Multiplication selection for the watchdog timer.
6:0
WDT[6:0]
相關(guān)PDF資料
PDF描述
T9021 TELECOMMUNICATIONS PRODUCTS
T9030 TELECOMMUNICATIONS PRODUCTS
T90FJR Dual Common Interface Hardware Controller- CIMax
T919N PHASE CONTROL THYRISTORS
T9790U CMOS 1 CHIP LSI FOR LCD ELECTRONIC CALCULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T9001 功能描述:罩類、盒類及殼類產(chǎn)品 15x14x3-1/2(3.13cf) 1 Compartment RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red
T9006 功能描述:罩類、盒類及殼類產(chǎn)品 15 x 14 x 3-1/2 (2.96cf) RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red
T9007 功能描述:罩類、盒類及殼類產(chǎn)品 13 1/8 x 13 1/8 x 3" 6 COMPARTMENTS RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red
T9008 制造商:Nortools International Ltd 功能描述:HSS METRIC DIE SET,M3-M12
T900BK 功能描述:罩類、盒類及殼類產(chǎn)品 of Box Dividers Clear RoHS:否 制造商:Bud Industries 產(chǎn)品:Boxes 外部深度:6.35 mm 外部寬度:6.35 mm 外部高度:2.56 mm NEMA 額定值: IP 等級(jí): 材料:Acrylonitrile Butadiene Styrene (ABS) 顏色:Red
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*