ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 55

• 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

ST7LITE49K2
Table 14.
Figure 20. Interrupt processing flowchart
Interrupt software priority levels
RESTORE PC, X, A, CC
Interrupt software priority
Level 3 (= interrupt disable)
FROM STACK
RESET
Level 0 (main)
Level 1
Level 2
Y
INSTRUCTION
INTERRUPT
INSTRUCTION
FETCH NEXT
PENDING
EXECUTE
N
“IRET”
N
Y
STAYS PENDING
THE INTERRUPT
Level
High
Low
Interrupt has the same or a
LOAD I1:0 FROM INTERRUPT SW REG.
LOAD PC FROM INTERRUPT VECTOR
lower software priority
than current one
STACK PC, X, A, CC
I1
1
0
1
I1:0
TLI
N
Interrupts
I0
0
1
0
1
Y
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