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ST7MC1K2-Auto 데이터시트(PDF) 64 Page - STMicroelectronics

부품명 ST7MC1K2-Auto
상세설명  Clock, reset and supply management
PDF  371 Pages
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Interrupts
ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto
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7.5
Interrupt registers
7.5.1
CPU CC register interrupt bits
CPU CC register
Reset value: 111x 1010 (xAh)
7
654
32
10
1I1
H
I0
N
Z
C
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Table 17.
CPU CC register interrupt bits description
Bit Name
Function
5, 3
I1, I0
Software interrupt priority
These two bits indicate the current interrupt software priority:
10: Interrupt software priority = level 0 (main)
01: Interrupt software priority = level 1
00: Interrupt software priority = level 2
11: Interrupt software priority = level 3 (interrupt disable)(1)
These 2 bits are set/cleared by hardware when entering in interrupt. The loaded
value is given by the corresponding bits in the interrupt software priority registers
(ISPRx). They can be also set/cleared by software with the RIM, SIM, HALT, WFI,
IRET and push/pop instructions (see Table 19: Dedicated interrupt instruction set).
1.
MCES, TRAP and reset events can interrupt a level 3 program.
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