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ST7DALI データシート(PDF) 36 Page - STMicroelectronics

部品番号 ST7DALI
部品情報  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI, DALI
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7DALI データシート(HTML) 36 Page - STMicroelectronics

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INTERRUPTS (Cont’d)
EXTERNAL INTERRUPT CONTROL REGISTER
(EICR)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7:6 = IS3[1:0] ei3 sensitivity
These bits define the interrupt sensitivity for ei3
(Port B0) according to Table 6.
Bit 5:4 = IS2[1:0] ei2 sensitivity
These bits define the interrupt sensitivity for ei2
(Port B3) according to Table 6.
Bit 3:2 = IS1[1:0] ei1 sensitivity
These bits define the interrupt sensitivity for ei1
(Port A7) according to Table 6.
Bit 1:0 = IS0[1:0] ei0 sensitivity
These bits define the interrupt sensitivity for ei0
(Port A0) according to Table 6.
Note: These 8 bits can be written only when the I
bit in the CC register is set.
Table 6. Interrupt Sensitivity Bits
.
EXTERNAL INTERRUPT SELECTION REGIS-
TER (EISR)
Read/Write
Reset Value: 0000 1100 (0Ch)
Bit 7:6 = ei3[1:0] ei3 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei3 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
* Reset State
Bit 5:4 = ei2[1:0] ei2 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei2 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
* Reset State
1) Note that PB4 cannot be used as an external in-
terrupt in HALT mode.
70
IS31
IS30
IS21
IS20
IS11
IS10
IS01
IS00
ISx1 ISx0
External Interrupt Sensitivity
0
0
Falling edge & low level
0
1
Rising edge only
1
0
Falling edge only
1
1
Rising and falling edge
70
ei31
ei30
ei21
ei20
ei11
ei10
ei01
ei00
ei31
ei30
I/O Pin
0
0
PB0 *
0
1
PB1
1
0
PB2
ei21
ei20
I/O Pin
0
0
PB3 *
0
1
PB4 1)
1
0
PB5
1
1
PB6
1


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