ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 62

• Manufacturer Part Number: ST7LITE49K2
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST7LITE49K2

• 8 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance: 10K write/erase cycles guaranteed Data retention
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: Internal trimmable 8 MHz RC oscillator, auto-wakeup internal low power - low frequency oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-halt, Auto-wakeup from Halt, Wait and Slow

Interrupts
8.5.3
Note:
62/245
1
2
External interrupt control register (EICR)
Reset value: 0000 0000 (00h)
Bits 7:6 = Reserved, must be kept cleared.
Bits 5:4 = IS2[1:0] ei2 sensitivity bits
Bits 3:2 = IS1[1:0] ei1 sensitivity bits
Bits 1:0 = IS0[1:0] ei0 sensitivity bits
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
function.
Table 19.
ISx1
0
0
1
1
These bits define the interrupt sensitivity for ei2 (Port C) according to
These bits define the interrupt sensitivity for ei1 (Port B) according to
These bits define the interrupt sensitivity for ei0 (Port A) according to
0
7
Interrupt sensitivity bits
ISx0
0
1
0
1
0
IS21
IS20
Read/write
External interrupt sensitivity
Falling edge & low level
Rising and falling edge
Falling edge only
Rising edge only
IS11
Section : External interrupt
IS10
IS01
Table
Table
Table
ST7LITE49K2
19.
19.
19.
IS00
0