HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 190

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

Section 3 DSP Operation
Input/output
control for
DSP data
registers
X0/X1, A0/A1
Control for X Memory:
The conditional execution based on the DC flag in DSR cannot control any MOVX/MOVY
instructions.
Rev. 4.00 Sep. 14, 2005 Page 140 of 982
REJ09B0023-0400
if ( !Nop ) {
}
else { X_MEM=0; XAB=0x000; }
X_MEM=1; XAB=ABx;
if ( load operation ) {
}
else XDB = Dx[31:16];
Figure 3.22 Load/Store Control for X and Y Data-Transfer Instructions
data-transfer operation
X_MEM and Y_MEM:
Select X and Y data memory
Instruction code for X
for X memory
Dx[31:16]=XDB;
Dx[15:0]=0x0000;
Control
X_MEM
X R/W
XDB
YDB
31
15
memory
4 kbytes
X data
ABx
R4 [Ax]
R5 [Ax]
XAB 16-bit
YAB 16-bit
1
16-bit
16-bit
/* Dx is X0 or X1 */
/* Dx is A0 or A1 */
0
31
15
memory
4 kbytes
Y data
R6 [Ay]
R7 [Ay]
ABy
1
0
Y_MEM
Y R/W
data-transfer operation
Instruction code for Y
for Y memory
Control
Input/output
control for
DSP data
registers
Y0/Y1, A0/A1