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參數(shù)資料
| 型號(hào)： | DS80CH11 |
| 英文描述： | System Energy Manager |
| 中文描述： | 系統(tǒng)能量管理器 |
| 文件頁(yè)數(shù)： | 22/88頁(yè) |
| 文件大?。?/td> | 598K |
| 代理商： | DS80CH11 |
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DS80CH11
011200 22/88
3.6
The SEM provides 16 sources of interrupt with three
priority levels. The Power–fail Interrupt (PFI), if
enabled, always has the highest priority. There are two
remaining user selectable priorities: high and low. If two
interrupts that have the same priority occur simulta-
INTERRUPT CONTROL
neously, the hardware–determined precedence given
below determines which is a acted upon. Except for the
PFI, all interrupts that are new to the 8051 family have a
lower natural priority than the originals.
INTERRUPT PRIORITY
Table 3–2
NAME
PFI
DESCRIPTION
Power Fail Interrupt
VECTOR
33h
NATURAL
PRIORITY
1
8051/DALLAS
DALLAS
INT0
External Interrupt 0
03h
2
8051
TF0
Timer 0
0Bh
3
8051
INT1
External Interrupt 1
13h
4
8051
TF1
Timer 1
1Bh
5
8051
SCON0
TI0 or RI0 from Serial Port 0
23h
6
8051
TF2
Timer 2
2Bh
7
8051
AMI
Activity Monitor Interrupt
3Bh
8
DALLAS
2WI1
2–Wire Serial Port 1
43h
9
DALLAS
ADI
A/D End of Conversion
4Bh
10
DALLAS
2WI2
2–Wire Serial Port 2
53h
11
DALLAS
KBI
Keyboard Buffer Input
5Bh
12
DALLAS
PBI1
Power Mgmt. Buffer Input #1
63h
13
DALLAS
KDI
Key Detect Input
6Bh
14
DALLAS
WDI
WatchDog Periodic Interrupt
73h
15
DALLAS
PBI2
Power Mgmt. Buffer Input #2
7Bh
16
DALLAS
INTERRUPT CONTROL SUMMARY
Table 3–3
INTERRUPT
SOURCE
FLAG(S)
FLAG
LOC.
ENABLE
ENABLE
LOC.
PRIORITY
PRIORITY
LOC.
Power Fail
PFI
WDCON.4
EPFI
WDCON.5
N/A
N/A
External 0
IE0
TCON.1
EX0
IE.0
PX0
IP.0
Timer 0
TF0
TCON.5
ET0
IE.1
PT0
IP.1
External 1
IE1
TCON.3
EX1
IE.2
PX1
IP.2
Timer 1
TF1
TCON.7
ET1
IE.3
PT1
IP.3
Serial Port 0
RI0,TI0
SCON0.0/
SCON0.1
ES0
IE.4
PS0
IP.4
Timer 2
TF2
T2CON.7
ET2
IE.5
PT2
IP.5
Activity monitor
AMF7–0
AMF.7–0
EAM
IE.6
PAM
IP.6
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