Samsung C8278X ユーザーズマニュアル

In Direct Address (DA) mode, the instruction provides the operand's 16-bit memory address. Jump (JP) and Call 
(CALL) instructions use this addressing mode to specify the 16-bit destination address that is loaded into the PC 
whenever a JP or CALL instruction is executed.  

The LDC and LDE instructions can use Direct Address mode to specify the source or destination address for 
Load operations to program memory (LDC) or to external data memory (LDE), if implemented. 

Sample Instructions:

LDC

R5,1234H

;    The values in the program address (1234H)
     are loaded into register R5.

LDE

R5,1234H

;    Identical operation to LDC example, except that
     external program memory is accessed.

dst/src

OPCODE

Program Memory

"0" or "1"

Lower Address Byte

LSB Selects Program
Memory or Data Memory:
"0" = Program Memory
"1" = Data Memory

Memory
Address
Used

Upper Address Byte

Program  or

Data Memory