ST20CX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST20CX

Instruction Set Reference Manual

STMicroelectronics 

in

in

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:

Secondary instruction.

Instruction is a descheduling point.

Instruction is interruptible.

See also: out

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