ST7FDALI データシートの表示（PDF） - STMicroelectronics

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ST7FDALI

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI, DALI

STMicroelectronics 

ST7DALI

INTERRUPTS (Cont’d)

EXTERNAL INTERRUPT CONTROL REGISTER

(EICR)

Read / Write

Reset Value: 0000 0000 (00h)

7

0

IS31 IS30 IS21 IS20 IS11 IS10 IS01 IS00

EXTERNAL INTERRUPT SELECTION REGIS-

TER (EISR)

Read / Write

Reset Value: 0000 1100 (0Ch)

7

0

ei31 ei30 ei21 ei20 ei11 ei10 ei01 ei00

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

ISx1 ISx0

00

01

10

11

.

External Interrupt Sensitivity

Falling edge & low level

Rising edge only

Falling edge only

Rising and falling edge

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

ei31

ei30

0

0

0

1

1

0

I/O Pin

PB0 *

PB1

PB2

* 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

ei21

ei20

0

0

0

1

1

0

1

1

I/O Pin

PB3 *

PB4 1)

PB5

PB6

* Reset State

1) Note that PB4 cannot be used as an external in-

terrupt in HALT mode.

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