HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 189

• Manufacturer Part Number: HD6417641
• Manufacturer: RENESAS [Renesas Technology Corp]

X and Y Data Transfer Instructions (MOVX.W and MOVY.W): This type of instruction uses
the XDB and the YDB to access X and Y data memories (they cannot access other memory
spaces). These two buses are separate from the instruction bus, therefore, there is no access
conflict between data memory access and instruction memory access.
Figure 3.22 shows load/store control for X and Y data transfer instructions. All memory accesses
are word mode accesses.
/* The value to be added to the address register depends on addressing
instructions.
For example, (+2 or R8[Ix] or +0) means that
+2:
R8[Ix]: if instruction is add-index-register
+0:
*/
function modulo ( AddrReg, Index ) {
if ( AddrReg[15:1]==ME[15:1] ) AddrReg[15:1]==MS[15:1];
else AddrReg=AddrReg+Index;
return AddrReg;
}
if instruction is increment
if instruction is not-update
Rev. 4.00 Sep. 14, 2005 Page 139 of 982
Section 3 DSP Operation
REJ09B0023-0400