ST72321R9-Auto datasheet(53/243 Pages) STMICROELECTRONICS

部件名	ST72321R9-Auto

功能描述	PLL for 2x frequency multiplication

PDF	243 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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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

3/0

RIM

IT1

IT4

IT1

IT2

IT3

11 / 10

SOFTWARE

PRIORITY

LEVEL

CPU CC

Reset value: 111x 1010 (xAh)

543

NZC

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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