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參數(shù)資料
| 型號： | TS80C51RD2-VIE |
| 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 |
| 文件頁數(shù)： | 49/85頁 |
| 文件大小： | 762K |
| 代理商： | TS80C51RD2-VIE |
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49
4188E–8051–08/06
AT/TS8xC51Rx2
7.
Power-Off Flag
The power-off flag allows the user to distinguish between a “cold start” reset and a “warm start”
reset.
A cold start reset is the one induced by V
CC
switch-on. A warm start reset occurs while V
CC
is still
applied to the device and could be generated for example by an exit from power-down.
The power-off flag (POF) is located in PCON register (See
Table 7-1
). POF is set by hardware
when V
CC
rises from 0 to its nominal voltage. The POF can be set or cleared by software allow-
ing the user to determine the type of reset.
The POF value is only relevant with a Vcc range from 4.5V to 5.5V. For lower Vcc value, reading
POF bit will return indeterminate value.
Table 7-1.
PCON Register
PCON - Power Control Register (87h)
6
5
Reset Value = 00X1 0000b
Not bit addressable
7
4
3
2
1
0
SMOD1
SMOD0
-
POF
GF1
GF0
PD
IDL
Bit
Number
Bit
Mnemonic
Description
7
SMOD1
Serial port Mode bit 1
Set to select double baud rate in mode 1, 2 or 3.
6
SMOD0
Serial port Mode bit 0
Clear to select SM0 bit in SCON register.
Set to to select FE bit in SCON register.
5
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4
POF
Power-Off Flag
Clear to recognize next reset type.
Set by hardware when V
CC
rises from 0 to its nominal voltage. Can also be set by
software.
3
GF1
General purpose Flag
Cleared by user for general purpose usage.
Set by user for general purpose usage.
2
GF0
General purpose Flag
Cleared by user for general purpose usage.
Set by user for general purpose usage.
1
PD
Power-Down mode bit
Cleared by hardware when reset occurs.
Set to enter power-down mode.
0
IDL
Idle mode bit
Clear by hardware when interrupt or reset occurs.
Set to enter idle mode.
相關PDF資料 |
PDF描述 |
|---|---|
| TS83C51RB2-LCB | High Performance 8-bit Microcontroller |
| TS83C51RB2-LCE | High Performance 8-bit Microcontroller |
| TS83C51RB2-LIB | High Performance 8-bit Microcontroller |
| TS83C51RB2-LIE | High Performance 8-bit Microcontroller |
| TS83C51RB2-MCB | High Performance 8-bit Microcontroller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TS80C51RD2-VIEB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TS80C51RD2-VIED | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| TS80C51RD2-VIER | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| TS80C51RD2-VIL | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| TS80C51RD2-VILB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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