ST7PSCR1E4M1/XXX 查看數據表（PDF） - STMicroelectronics

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ST7PSCR1E4M1/XXX

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

ST7SCR

INTERRUPTS (Cont’d)

Table 6. Dedicated Interrupt Instruction Set

Instruction

HALT

IRET

JRM

JRNM

POP CC

RIM

SIM

TRAP

WFI

New Description

Entering Halt mode

Interrupt routine return

Jump if I1:0=11

Jump if I1:0<>11

Pop CC from the Stack

Enable interrupt (level 0 set)

Disable interrupt (level 3 set)

Software trap

Wait for interrupt

Function/Example

Pop CC, A, X, PC

I1:0=11 ?

I1:0<>11 ?

Mem => CC

Load 10 in I1:0 of CC

Load 11 in I1:0 of CC

Software NMI

I1 H I0 N Z C

1

0

I1 H I0 N Z C

I1 H I0 N Z C

1

0

1

1

1

1

1

0

Note: 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.

In order not to lose the current software priority level, the RIM, SIM, HALT, WFI and POP CC instructions

should never be used in an interrupt routine.

Table 7. Interrupt Mapping

N°

Source

Block

Description

RESET Reset

TRAP

Software Interrupt

0

ICP

FLASH Start programming NMI interrupt

1

UART

ISO7816-3 UART Interrupt

2

USB

USB Communication Interrupt

3

WAKUP1 External Interrupt Port C

4

WAKUP2 External Interrupt Port A

5

TIM

TBU Timer Interrupt

6 CARDDET 1) Smartcard Insertion/Removal Interrupt 1)

7

ESUSP End suspend Interrupt

8

Not used

Register

Label

N/A

Priority

Order

Highest

Priority

Exit

from

HALT

yes

no

UIC

USBISTR

yes

yes

TBUSR

no

USCUR

yes

USBISTR

Lowest

Priority no

Address

Vector

FFFEh-FFFFh

FFFCh-FFFDh

FFFAh-FFFBh

FFF8h-FFF9h

FFF6h-FFF7h

FFF4h-FFF5h

FFF2h-FFF3h

FFF0h-FFF1h

FFEEh-FFEFh

FFECh-FFEDh

FFEAh-FFEBh

Note 1: This interrupt can be used to exit from USB suspend mode.

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