ST7FMC1K2TC STMICROELECTRONICS [STMicroelectronics], ST7FMC1K2TC Datasheet - Page 41
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ST7FMC1K2TC
Manufacturer Part Number
ST7FMC1K2TC
Description
8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST7FMC1K2TC.pdf
(308 pages)
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INTERRUPTS (Cont’d)
7.3 INTERRUPTS AND LOW POWER MODES
All interrupts allow the processor to exit the WAIT
low power mode. On the contrary, only external
and other specified interrupts allow the processor
to exit from the HALT modes (see column “Exit
from HALT” in “Interrupt Mapping” table). When
several pending interrupts are present while exit-
ing HALT mode, the first one serviced can only be
an interrupt with exit from HALT mode capability
and it is selected through the same decision proc-
ess shown in
Note: If an interrupt, that is not able to Exit from
HALT mode, is pending with the highest priority
when exiting HALT mode, this interrupt is serviced
after the first one serviced.
Figure 22. Concurrent Interrupt Management
Figure 23. Nested Interrupt Management
11 / 10
11 / 10
MAIN
MAIN
Figure
RIM
RIM
21.
IT2
IT2
IT1
IT1
IT4
MCES
MCES
IT1
IT4
IT0
IT0
7.4 CONCURRENT & NESTED MANAGEMENT
The following
different interrupt management modes. The first is
called concurrent mode and does not allow an in-
terrupt to be interrupted, unlike the nested mode in
Figure
in this order from the lowest to the highest: MAIN,
IT4, IT3, IT2, IT1, IT0, MCES. The software priority
is given for each interrupt.
Warning: A stack overflow may occur without no-
tifying the software of the failure.
IT3
IT3
IT1
23. The interrupt hardware priority is given
IT4
IT2
Figure 22
10
10
SOFTWARE
PRIORITY
LEVEL
SOFTWARE
PRIORITY
LEVEL
MAIN
MAIN
and
3
3
3
3
3
3
3/0
3
3
2
1
3
3
3/0
ST7MC1/ST7MC2
Figure 23
I1
I1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
0 0
0 1
1 1
1 1
show two
I0
I0
41/308
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