- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3774 > AT80C51RD2-RLRUM (Atmel)IC MCU 80C51 HI PERFORM 44VQFP PDF資料下載
參數(shù)資料
| 型號： | AT80C51RD2-RLRUM |
| 廠商： | Atmel |
| 文件頁數(shù)： | 55/81頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU 80C51 HI PERFORM 44VQFP |
| 產(chǎn)品培訓(xùn)模塊： | MCU Product Line Introduction |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | 80C |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 40MHz |
| 連通性： | UART/USART |
| 外圍設(shè)備： | POR，PWM，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 44-LQFP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | AT80C51RD2-RLRUMDKR |
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頁當(dāng)前第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頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁
59
4113D–8051–01/09
AT80C51RD2
Table 15-2.
WDTPRG Register
WDTPRG - Watchdog Timer Out Register (0A7h)
Reset Value = XXXX X000
15.2
WDT During Power-down and Idle
In Power-down mode the oscillator stops, which means the WDT also stops. While in Power-
down mode the user does not need to service the WDT. There are 2 methods of exiting Power-
down mode: by a hardware reset or via a level activated external interrupt which is enabled prior
to entering Power-down mode. When Power-down is exited with hardware reset, servicing the
WDT should occur as normal, whenever the AT80C51RD2 is reset. Exiting Power-down with an
interrupt is significantly different. The interrupt is held low long enough for the oscillator to stabi-
lize. When the interrupt is brought high, the interrupt is serviced. To prevent the WDT from
resetting the device while the interrupt pin is held low, the WDT is not started until the interrupt is
pulled high. It is suggested that the WDT be reset during the interrupt service routine.
To ensure that the WDT does not overflow within a few states of exiting of power-down, it is bet-
ter to reset the WDT just before entering power-down.
In the Idle mode, the oscillator continues to run. To prevent the WDT from resetting the
AT80C51RD2 while in Idle mode, the user should always set up a timer that will periodically exit
Idle, service the WDT, and re-enter Idle mode.
76
543
210
-
S2
S1
S0
Bit
Number
Bit
Mnemonic Description
7-
Reserved
The value read from this bit is undetermined. Do not try to set this bit.
6-
5-
4-
3-
2S2
WDT Time-out select bit 2
1S1
WDT Time-out select bit 1
0S0
WDT Time-out select bit 0
S2S1 S0Selected Time-out
00
0
(214 - 1) machine cycles, 16. 3 ms @ F
osc =12 MHz
00
1
(2
15 - 1) machine cycles, 32.7 ms @ F
osc=12 MHz
01
0 (216 - 1) machine cycles, 65. 5 ms @ F
osc=12 MHz
01
1
(217 - 1) machine cycles, 131 ms @ F
osc=12 MHz
10
0
(2
18 - 1) machine cycles, 262 ms @ F
osc=12 MHz
10
1 (219 - 1) machine cycles, 542 ms @ F
osc=12 MHz
11
0
(220 - 1) machine cycles, 1.05 s @ F
osc=12 MHz
11
1
(2
21 - 1) machine cycles, 2.09 s @ F
osc=12 MHz
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 42973-3 | RETAINING SPRING AMP LF L.P. |
| 42973-1 | RETAINING SPRING AMP LF L.P. |
| MAX7320AEE+ | IC I/O EXPANDER I2C 8B 16QSOP |
| PCA9673D,112 | IC I/O EXPANDER I2C 16B 24SOIC |
| 530286-3 | CONN KEYING PLUG TWIN LEAF .040 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT80C51RD2-RLTIL | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-RLTIM | 功能描述:IC MCU 8051 5V SPI 20MHZ 44-VQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR，WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB（32K x 8） 程序存儲器類型:OTP 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:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP（0.600"，15.24mm） 包裝:管件 |
| AT80C51RD2-RLTUL | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-RLTUM | 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V 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(shí)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(fēng)格:SMD/SMT |
| AT80C51RD2-SLRUM | 功能描述:8位微控制器 -MCU MCU 8-Bit HI Perform ROMless 3-5V 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(shí)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(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。