ST72F324K2TCTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72F324K2TCTR

8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI

STMicroelectronics 

Interrupts

ST72324xx-Auto

Figure 19. Nested interrupt management

Software

priority

I1

I0

level

TRAP

3

11

IT0

3

11

IT1

IT1

2

00

IT2

IT2

1

01

IT3

RIM

IT4

IT4

3

11

3

11

Main

11 / 10

Main

3/0

10

uct(s) 7.5

Obsolete Product(s) - Obsolete Prod 7.5.1

Interrupt registers

CPU CC register interrupt bits

CPU CC

7

1

R/ W

6

1

R/ W

5

I1

R/ W

4

H

R/ W

3

I0

R/ W

Reset value: 111x 1010(xAh)

2

1

0

N

Z

C

R/ W

R/ W

R/ W

Table 15. CPU CC register interrupt bits description

Bit Name

Function

5 I1 Software Interrupt Priority 1

3 I0 Software Interrupt Priority 0

Table 16. Interrupt software priority levels

Interrupt software priority

Level

I1

I0

Level 0 (main)

Low

1

0

Level 1

0

1

Level 2

Level 3 (= interrupt disable)(1)

0

0

High

1

1

1. TRAP and RESET events can interrupt a level 3 program.

These two bits indicate the current interrupt software priority (see Table 16) 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).

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Doc ID 13841 Rev 1

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