參數(shù)資料
型號(hào): ST72521BAR9
英文描述: ST72521B - 80/64-PIN 8-BIT MCU WITH 32 TO 60K ROM. FIVE TIMERS. SPI. SCI. I2C. CAN INTERFACE
中文描述: ST72521B - 80/64-PIN 8位32至60,000 ROM的微處理器。 5個(gè)定時(shí)器。的SPI。脊髓損傷。 I2C總線。 CAN接口
文件頁(yè)數(shù): 37/198頁(yè)
文件大?。?/td> 2504K
代理商: ST72521BAR9
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ST72521B
37/198
INTERRUPTS
(Cont’d)
6.7 EXTERNAL INTERRUPT CONTROL REGISTER (EICR)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7:6 =
IS1[1:0]
ei2 and ei3 sensitivity
The interrupt sensitivity, defined using the IS1[1:0]
bits, is applied to the following external interrupts:
- ei2 (port B3..0)
- ei3 (port B7..4)
These 2 bits can be written only when I1 and I0 of
the CC register are both set to 1 (level 3).
Bit 5 =
IPB
Interrupt polarity for port B
This bit is used to invert the sensitivity of the port B
[3:0] external interrupts. It can be set and cleared
by software only when I1 and I0 of the CC register
are both set to 1 (level 3).
0: No sensitivity inversion
1: Sensitivity inversion
Bit 4:3 =
IS2[1:0]
ei0 and ei1 sensitivity
The interrupt sensitivity, defined using the IS2[1:0]
bits, is applied to the following external interrupts:
- ei0 (port A3..0)
- ei1 (port F2..0)
These 2 bits can be written only when I1 and I0 of
the CC register are both set to 1 (level 3).
Bit 2 =
IPA
Interrupt polarity for port A
This bit is used to invert the sensitivity of the port A
[3:0] external interrupts. It can be set and cleared
by software only when I1 and I0 of the CC register
are both set to 1 (level 3).
0: No sensitivity inversion
1: Sensitivity inversion
Bit 1 =
TLIS
TLI sensitivity
This bit allows to toggle the TLI edge sensitivity. It
can be set and cleared by software only when
TLIE bit is cleared.
0: Falling edge
1: Rising edge
Bit 0 =
TLIE
TLI enable
This bit allows to enable or disable the TLI capabil-
ity on the dedicated pin. It is set and cleared by
software.
0: TLI disabled
1: TLI enabled
Note
: a parasitic interrupt can be generated when
7
0
IS11
IS10
IPB
IS21
IS20
IPA
TLIS
TLIE
IS11 IS10
External Interrupt Sensitivity
IPB bit =0
IPB bit =1
0
0
Falling edge &
low level
Rising edge only
Falling edge only
Rising and falling edge
Rising edge
& high level
Falling edge only
Rising edge only
0
1
1
1
0
1
IS11 IS10
External Interrupt Sensitivity
0
0
1
1
0
1
0
1
Falling edge & low level
Rising edge only
Falling edge only
Rising and falling edge
IS21 IS20
External Interrupt Sensitivity
IPA bit =0
IPA bit =1
0
0
Falling edge &
low level
Rising edge only
Falling edge only
Rising and falling edge
Rising edge
& high level
Falling edge only
Rising edge only
0
1
1
1
0
1
IS21 IS20
External Interrupt Sensitivity
0
0
1
1
0
1
0
1
Falling edge & low level
Rising edge only
Falling edge only
Rising and falling edge
相關(guān)PDF資料
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ST72521BM6 ST72521B - 80/64-PIN 8-BIT MCU WITH 32 TO 60K ROM. FIVE TIMERS. SPI. SCI. I2C. CAN INTERFACE
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