DP805X datasheet(55/79 Pages) DCD

Part #	DP805X

Description	Pipelined High Performance Microcontroller Instructions set details ver 3.10

PDF	79 Pages

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Manufacturer	DCD [Digital Core Design]

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DP805x Instructions set details

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3.26.

MOVX

Instruction:

MOVX <dest-byte>, <src-byte>

Function:

Move external

Description:

The MOVX instructions transfer data between the accumulator and a

byte of external data memory, hence the X appended to MOV. There

are two types of instructions, differing in whether they provide an eight-

bit or sixteen-bit indirect address to the external data RAM.

In the first type, the contents of R0 or R1 in the current register bank

provides an eight-bit address, in the second type of MOVX instructions,

the data pointer generates a sixteen-bit address.

3.26.1.

MOVX A, @RI

Operation:

(PC)

← (PC) + 1

(A)

← ((Ri))

Bytes:

Cycles:

Encoding:

3.26.2.

MOVX A, @DPTR

Operation:

(PC)

← (PC) + 1

(A)

← ((DPTR))

Bytes:

Cycles:

Encoding:

* MOVX cycles depends on STRETCH register. Shown values with STRETCH=0.

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