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參數(shù)資料
| 型號： | EM78612 |
| 英文描述： | Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 16-QFN |
| 中文描述： | USB控制器 |
| 文件頁數(shù)： | 29/29頁 |
| 文件大小： | 692K |
| 代理商： | EM78612 |
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EM78612
Universal Serial Bus Microcontroller Series
This specification may change without further notice.
9
3/5/2003 (V1.0)
R3 (Status Register)
Default Value:(0B_0001_1000)
7
6
5
4
3
2
1
0
-
PS0
T
P
Z
DC
C
R3 [0]
Carry flag.
R3 [1]
Auxiliary carry flag.
R3 [2]
Zero flag. It will be set to 1 when the result of an arithmetic or logic operation is
zero.
R3 [3]
Power down flag. It will be set to 1 during Power-on phase or by “WDTC” command
and cleared when the MCU enters into Power down mode. It remains in its previous
state after WatchDog Reset.
1: Power-on.
0: Power down
R3 [4]
Time-out flag. It will be set to 1 during Power-on phase or by “WDTC” command. It
is reset to 0 by WDT time-out.
1: WatchDog timer without overflow.
0: WatchDog timer with overflow.
The various states of Power down flag and Time-out flag at different conditions are shown
below:
T
P
Condition
1
0
1
*P
0
Power-on reset
WDTC instruction
WDT time-out
Power down mode
Wakeup caused by port change during Power down mode
*P: Previous status before WDT reset
R3 [5]
Page selection bit. This bit is used to select a page of program memory (refer to R2,
Program Counter).
PS0
Program Memory Page [Address]
0
Page 0 [0000-03FF]
1
Page 1 [0400-07FF]
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