- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361798 > W925E625 Telephone Controller PDF資料下載
參數(shù)資料
| 型號： | W925E625 |
| 英文描述： | Telephone Controller |
| 中文描述： | 電話控制器 |
| 文件頁數(shù)： | 43/71頁 |
| 文件大?。?/td> | 1055K |
| 代理商： | W925E625 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁當(dāng)前第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁
W925E/C625
8-bit CID Microcontroller
i.e. after writing a 1 to this bit the software will automatically clear it. The watchdog timer will now
count clock cycles. The time-out interval is selected by the two bits WD1 and WD0 (CKCON.7
and CKCON.6). When the selected time-out occurs, the Watchdog interrupt flag WDIF
(WDCON.3) is set. After the time-out has occurred, the watchdog timer waits for an additional 512
clock cycles. The software must issue a RWT to reset the watchdog before the 512 clocks have
elapsed. If the Watchdog Reset EWT (WDCON.1) is enabled, then 512 clocks after the time-out,
if there is no RWT, a system reset due to Watchdog timer will occur. This will last for two machine
cycles, and the Watchdog timer reset flag WTRF (WDCON.2) will be set. This indicates to the
software that the watchdog was the cause of the reset.
When used as a simple timer, the reset and interrupt functions are disabled. The timer will set the
WDIF flag each time the timer completes the selected time interval. The WDIF flag is polled to
detect a time-out and the RWT allows software to restart the timer. The Watchdog timer can also
be used as a very long timer. The interrupt feature is enabled in this case. Every time the time-out
occurs an interrupt will occur if the global interrupt enable EA is set.
Table 6 Time-out values for the Watchdog timer
WD1
WD0
Watchdog
Interval
Clocks
3.579545 MHz
0
0
2
12
0
1
2
15
1
0
2
18
1
1
2
21
The Watchdog timer will de disabled by a power-on/fail reset. The Watchdog timer reset does not
disable the watchdog timer, but will restart it. In general, software should restart the timer to put it
into a known state.
The control bits that support the Watchdog timer are discussed below.
WATCHDOG CONTROL
WDIF: WDCON.3 - Watchdog Timer Interrupt flag. This bit is set whenever the time-out occurs in
the watchdog timer. If the Watchdog interrupt is enabled (EIE.5), then an interrupt will
occur (if the global interrupt enable is set and other interrupt requirements are met).
Software or any reset can clear this bit.
WTRF: WDCON.2 - Watchdog Timer Reset flag. This bit is set whenever a watchdog reset
occurs. This bit is useful for determined the cause of a reset. Software must read it, and
clear it manually. A Power-fail reset will clear this bit. If EWT = 0, then this bit will not be
affected by the watchdog timer.
EWT: WDCON.1 - Enable Watchdog timer Reset. This bit when set to 1 will enable the
Watchdog timer reset function. Setting this bit to 0 will disable the Watchdog timer reset
function, but will leave the timer running
RWT: WDCON.0 - Reset Watchdog Timer. This bit is used to clear the Watchdog timer and to
restart it. This bit is self-clearing, so after the software writes 1 to it the hardware will
automatically clear it. If the Watchdog timer reset is enabled, then the RWT has to be set
by the user within 512 clocks of the time-out. If this is not done then a Watchdog timer
reset will occur.
CLOCK CONTROL
Revision : A6
-43-
Release Date : 2002/7/2
Number of
Fosc=
Fosc=
32768 Hz
0.125 S
Reset of
Clocks
4608
4096
1.14 mS
32786
262144
2097152
9.15 mS
73.23 mS
585.87 mS
1 S
8 S
64 S
33280
262656
2097664
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W9320 | A-Law/u-Law CODEC |
| W9320S | A-Law/u-Law CODEC |
| W942508BH | DRAM |
| W942516BH | DRAM |
| W9451GBDA-6 | SDRAM|DDR|64MX64|CMOS|DIMM|184PIN|PLASTIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W925E625FG | 功能描述:IC MCU 8-BIT W/CID 160-PQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W925 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| W925EP01 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT CID MICROCONTROLLER |
| W925EP01FG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT CID MICROCONTROLLER |
| W925G240 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT CID MICROCONTROLLER |
| W925G625 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-bit CID MICROCONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。