參數(shù)資料
型號： ST622XC-KIT
英文描述： STARTER KIT DATASHEET FOR ST620X. ST621X AND ST622X
中文描述： 入門套件部件的ST620X。 ST621X及ST622X
文件頁數(shù)： 30/84頁
文件大?。?/td> 969K
代理商： ST622XC-KIT
30/84
ST62T28C/E28C
INTERRUPTS
(Cont’d)
Interrupt Polarity Register (IPR)
Address: DAh
—
Read/Write
In conjunction with I/O register ESB bit, the polarity
of I/O pins triggered interrupts can be selected by
setting accordingly the Interrupt Polarity Register
(IPR). If a bit in IPR is set to one the corresponding
port interrupt is inverted (e.g. IPR bit 2 = A; port C
generates interrupt on rising edge. At reset, IPR is
cleared and all port interrupts are not inverted (e.g.
Port C generates interrupts on falling edges).
Bit 7 - Bit 4 =
Unused
.
Bit 3 =
Port D Interrupt Polarity
.
Bit 2 =
Port C Interrupt Polarity
.
Bit 1=
Port A Interrupt Polarity
.
Bit 0 =
Port B Interrupt Polarity
.
Tables 11. I/O Interrupts selections according to IPR, IOR programming
7
0
-
-
-
-
PortD PortC PortA PortB
GEN
IPR3
IPR0
IOR5
Port B occurrence
Port D occurrence
Interrupt
source
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
X
0
0
1
1
0
0
1
1
X
0
1
0
1
0
1
0
1
X
falling edge
rising edge
rising edge
falling edge
falling edge
rising edge
rising edge
falling edge
Disabled
falling edge
rising edge
falling edge
rising edge
rising edge
falling edge
rising edge
falling edge
Disabled
2
GEN
IPR1
IOR6
Port A occurrence
Interrupt
source
1
1
1
1
0
0
0
1
1
X
0
1
0
1
X
falling edge
low level
rising edge
high level
Disabled
1
IPR2
0
1
Port C occurrence
falling edge
rising edge
Interrupt source
0
30
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