ST7LITE49M STMicroelectronics, ST7LITE49M Datasheet - Page 52

• Manufacturer Part Number: ST7LITE49M
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST7LITE49M

• 4 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
• 128 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
• A/d Converter: 10 input channels

Interrupts
8.4
Caution:
52/188
Concurrent and nested management
The following
first is called concurrent mode and does not allow an interrupt to be interrupted, unlike the
nested mode in
lowest to the highest: MAIN, IT5, IT4, IT3, IT2, IT1, IT0. The software priority is given for
each interrupt.
A stack overflow may occur without notifying the software of the failure.
Figure 22. Concurrent interrupt management
Figure 23. Nested interrupt management
11 / 10
MAIN
11 / 10
RIM
MAIN
RIM
Figure 22
Figure
IT2
IT3
23. The interrupt hardware priority is given in this order from the
IT1
and
IT2
Figure 23
IT4
Doc ID 13562 Rev 3
IT0
TLI
IT2
show two different interrupt management modes. The
IT4
IT1
IT0
IT4
IT3
IT1
IT5
IT2
10
SOFTWARE
PRIORITY
LEVEL
10
SOFTWARE
PRIORITY
LEVEL
MAIN
MAIN
3
3
3
3
3
3
3/0
3
3
2
1
3
3
3/0
I1
I1
ST7LITE49M
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
0 0
0 1
1 1
1 1
I0
I0