ST72321BR9-AUTO View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72321BR9-AUTO

8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface

STMicroelectronics 

Prev 61 62 63 64 65 66 67 68 69 70 Next

ST72321Bxxx-Auto

Interrupts

Note:

Otherwise, the software priority stays unchanged up to the next interrupt request (after the

IRET of the interrupt x).

Table 18. Interrupt dedicated instruction set

Instruction

New description

Function/Example I1 H I0 N Z C

HALT Entering Halt mode

1

0

IRET Interrupt routine return

Pop CC, A, X, PC

I1 H I0 N Z C

JRM

JRNM

Jump if I1:0 = 11 (level 3)

Jump if I1:0 <> 11

I1:0 = 11 ?

I1:0 <> 11 ?

POP CC Pop CC from the Stack

Mem => CC

I1 H I0 N Z C

RIM Enable interrupt (level 0 set) Load 10 in I1:0 of CC 1

0

SIM Disable interrupt (level 3 set) Load 11 in I1:0 of CC 1

1

TRAP

WFI

Software trap

Wait for interrupt

Software NMI

1

1

1

0

During the execution of an interrupt routine, the HALT, POPCC, RIM, SIM and WFI

instructions change the current software priority up to the next IRET instruction or one of the

previously mentioned instructions.

61/247

Share Link: