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ST72321R7-Auto 데이터시트(PDF) 53 Page - STMicroelectronics

부품명 ST72321R7-Auto
상세설명  PLL for 2x frequency multiplication
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ST72321R7-Auto 데이터시트(HTML) 53 Page - STMicroelectronics

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ST72321xx-Auto
Interrupts
Doc ID 13829 Rev 1
53/243
Figure 20.
Nested interrupt management
7.5
Interrupt register description
7.5.1
CPU CC register interrupt bits
These two bits indicate the current interrupt software priority (see Table 17) and 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: Interrupt dedicated instruction set).
MAIN
IT2
TRAP
MAIN
IT0
3
2
1
3
3
3/0
3
11
00
01
11
11
11
RIM
IT1
IT4
IT4
IT1
IT2
IT3
I1
I0
11 / 10
10
SOFTWARE
PRIORITY
LEVEL
CPU CC
Reset value: 111x 1010 (xAh)
76
543
21
0
11
I1
H
I0
NZC
RW
RW
RW
RW
RW
RW
Table 16.
CPU CC register interrupt bits description
Bit
Name
Function
5I1
Interrupt Software Priority 1
3I0
Interrupt Software Priority 0



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