ST20-C1 datasheet(104/205 Pages) STMICROELECTRONICS

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ST20-C1 데이터시트(PDF) 104 Page - STMicroelectronics

부품명	ST20-C1

상세설명	Instruction Set Reference Manual

PDF	205 Pages

Scroll/Zoom	100%

제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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104 / 205 page

104/205

ecall

exception call

Code: 23 F1

Description: Take a trap with exception level indicated by Areg. This instruction can

be used to implement system calls to an operating system.

Definition:

Areg

′← Breg

Breg

′← Creg

Creg

′← Areg

if (trap level Areg is installed)

take trap level Areg

Status Register:

The status register is saved and a new status register with set values is loaded.

Comments:

Secondar y instruction.

Areg must be in the range

LowestException to HighestException.

The exception type must be

ExceptionProcessType.

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