参数资料
型号: ST62P35BQ3/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP52
封装: PLASTIC, QFP-52
文件页数: 21/82页
文件大小: 617K
代理商: ST62P35BQ3/XXX
28/82
ST62T35B/E35B
IINTERRUPTS (Cont’d)
Interrupt Polarity Register (IPR)
Address: DAh
Read/Write
In conjunction with IOR register ESB bit, the polar-
ity of I/O pins triggered interrupts can be selected
by setting accordingly the Interrupt Polarity Regis-
ter (IPR). If a bit in IPR is set to one the corre-
sponding port interrupt is inverted (e.g. IPR bit 2 =
1 ; port C generates interrupt on rising edge. At re-
set, IPR is cleared and all port interrupts are not
inverted (e.g. Port C generates interrupts on fall-
ing edges).
Bit 7 - Bits 5 =
Unused.
Bit 4 =
Port E Interrupt Polarity.
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
70
-
PortE PortD PortC PortA PortB
GEN
IPR3
IPR0
IOR5
Port B occurence
Port D occurence
Interrupt
source
1
0
falling edge
2
1
0
1
rising edge
1
0
1
0
rising edge
falling edge
1
0
1
falling edge
rising edge
1
0
falling edge
rising edge
1
0
1
rising edge
falling edge
1
0
rising edge
1
falling edge
0
X
Disabled
GEN
IPR4
IPR1
IOR6
Port A occurence
Port E occurence
Interrupt
source
1
0
falling edge
1
0
1
low level
1
0
1
0
rising edge
falling edge
1
0
1
high level
low level
1
0
falling edge
rising edge
1
0
1
low level
high level
1
0
rising edge
1
high level
0
X
Disabled
IPR2
Port C occurence
Interrupt source
0
falling edge
0
1
rising edge
27
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