DP80390 datasheet(68/84 Pages) DCD

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DP80390 Instructions set details

- 68 -

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3.32.

RET *

3.32.1.

LARGE

Function:

Return from subroutine

Description:

RET pops the PC successively from the stack, decrementing the stack

pointer by two. Program execution continues at the resulting address,

generally the instruction immediately following an ACALL or LCALL. No

flags are affected.

Operation:

(PC15-8)

← ((SP))

(SP)

← (SP) - 1

(PC7-0)

← ((SP))

(SP)

← (SP) - 1

Bytes:

Cycles:

Encoding:

3.32.2.

FLAT

Function:

Return from subroutine

Description:

RET pops the PC successively from the stack, decrementing the stack

pointer by three. Program execution continues at the resulting address,

generally the instruction immediately following an ACALL or LCALL. No

flags are affected.

Operation:

(PC23-16)

← ((SP))

(SP)

← (SP) - 1

(PC15-8)

← ((SP))

(SP)

← (SP) - 1

(PC7-0)

← ((SP))

(SP)

← (SP) - 1

Bytes:

Cycles:

Encoding:

* instruction modified regarding to standard 80C51

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