ST7LITE49M STMicroelectronics, ST7LITE49M Datasheet - Page 52

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ST7LITE49M

Manufacturer Part Number
ST7LITE49M
Description
8-bit MCU
Manufacturer
STMicroelectronics
Datasheet

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

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Part Number:
ST7LITE49M
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0
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

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