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參數(shù)資料
| 型號(hào)： | AT83C51RD2-SLSUL |
| 廠商： | International Rectifier |
| 英文描述： | High Performance 8-bit Microcontroller |
| 中文描述： | 高性能8位微控制器 |
| 文件頁(yè)數(shù)： | 45/85頁(yè) |
| 文件大?。?/td> | 762K |
| 代理商： | AT83C51RD2-SLSUL |
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45
4188E–8051–08/06
AT/TS8xC51Rx2
Figure 6-14.
Power-Down Exit Waveform
Exit from power-down by reset redefines all the SFRs, exit from power-down by external inter-
rupt does no affect the SFRs.
Exit from power-down by either reset or external interrupt does not affect the internal RAM
content.
Note:
If idle mode is activated with power-down mode (IDL and PD bits set), the exit sequence is
unchanged, when execution is vectored to interrupt, PD and IDL bits are cleared and idle mode is
not entered.
Table 6-20.
The state of ports during idle and power-down mode
* Port 0 can force a "zero" level. A "one" will leave port floating.
INT1
INT0
XTAL1
Power-down phase
Oscillator restart phase
Active phase
Active phase
Mode
Program
Memory
ALE
PSEN
PORT0
PORT1
PORT2
PORT3
Idle
Internal
1
1
Port Data*
Port Data
Port Data
Port Data
Idle
External
1
1
Floating
Port Data
Address
Port Data
Power-down
Internal
0
0
Port Data*
Port Data
Port Data
Port Data
Power-down
External
0
0
Floating
Port Data
Port Data
Port Data
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| AT83C51RD2-SLSUM | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
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