ST20C2 datasheet(90/212 Pages) STMICROELECTRONICS

Part #	ST20C2

Description	Instruction Set Reference Manual

PDF	212 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

90 / 212 page

90/212

input message

Code: F7

Description: Input a message. The corresponding output is performed by an

out,

outword or outbyte instruction, and must specify a message of the same length. Areg

is the unsigned length in bytes, Breg is a pointer to the channel and Creg is a pointer

to where the message is to be stored. The process executing

in will be descheduled if

the channel is external or is not ready, and is rescheduled when the communication is

complete.

Definition:

Synchronize, and input Aregunsigned bytes from channel Breg to address Creg

Areg

′← undefined

Breg

′← undefined

Creg

′← undefined

Error signals: Can cause

InternalChannel or ExternalChannel trap to be signalled (if

enabled) when the process is rescheduled after synchronization.

Comments:

Secondar y instruction.

Instruction is a descheduling point.

Instruction is interruptible.

ST20C2 Datasheet(PDF) 90 Page - STMicroelectronics