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SH7050 Datasheet(PDF) 47 Page - Renesas Technology Corp |
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SH7050 Datasheet(HTML) 47 Page - Renesas Technology Corp |
47 / 841 page Section 2 CPU Rev. 5.00 Jan 06, 2006 page 27 of 818 REJ09B0273-0500 Immediate Data: Byte (8 bit) immediate data resides in instruction code. Word or longword immediate data is not input via instruction codes but is stored in a memory table. An immediate data transfer instruction (MOV) accesses the memory table using the PC relative addressing mode with displacement (table 2.5). Table 2.5 Immediate Data Accessing Classification SH7050 Series CPU Example of Conventional CPU 8-bit immediate MOV #H'12,R0 MOV.B #H'12,R0 16-bit immediate MOV.W @(disp,PC),R0 ................. .DATA.W H'1234 MOV.W #H'1234,R0 32-bit immediate MOV.L @(disp,PC),R0 ................. .DATA.L H'12345678 MOV.L #H'12345678,R0 Note: @(disp, PC) accesses the immediate data. Absolute Address: When data is accessed by absolute address, the value already in the absolute address is placed in the memory table. Loading the immediate data when the instruction is executed transfers that value to the register and the data is accessed in the indirect register addressing mode (table 2.6). Table 2.6 Absolute Address Accessing Classification SH7050 Series CPU Example of Conventional CPU Absolute address MOV.L @(disp,PC),R1 MOV.B @R1,R0 .................. .DATA.L H'12345678 MOV.B @H'12345678,R0 Note: @(disp,PC) accesses the immediate data. |
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