ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 48

• Manufacturer Part Number: ST7DALIF2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7DALIF2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

Interrupts
10.4
10.4.1
Note:
10.4.2
48/171
1
2
Interrupt registers
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
Bit 5:4 = IS2[1:0] ei2 sensitivity
These bits define the interrupt sensitivity for ei2 (Port B3) according to
Bit 3:2 = IS1[1:0] ei1 sensitivity
These bits define the interrupt sensitivity for ei1 (Port A7) according to
Bit 1:0 = IS0[1:0] ei0 sensitivity
These bits define the interrupt sensitivity for ei0 (Port A0) according to
These 8 bits can be written only when the I bit in the CC register is set.
Changing the sensitivity of a particular external interrupt clears this pending interrupt. This
can be used to clear unwanted pending interrupts. Refer to section
registers.
Table 16.
External interrupt selection register (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 according to the table below.
ISx1
IS31
ei31
0
0
1
1
7
7
Interrupt sensitivity bits
ISx0
0
1
0
1
IS30
ei30
IS21
ei21
IS20
ei20
External interrupt sensitivity
Falling edge & low level
Rising and falling edge
Falling edge only
Rising edge only
IS11
ei11
IS10
ei10
Section 10.4: Interrupt
Table
Table
Table
Table
IS01
ei01
16.
16.
16.
16.
ST7DALIF2
ei00
IS00
0
0