Renesas M32R/ECU Series User Manual page 807

Appendix 4
Appendix 4.1 Precautions about the CPU
Appendix 4.1.1 Precautions Regarding Data Transfer
When transferring data, be aware that data arrangements in registers and memory are different.
• Word data (32 bits)
• Halfword data (16 bits)
• Byte data (8 bits)
Figure 4.1.1 Difference in Data Arrangements
Data in registers
(R0–R15)
HH HL LH LL
b0
(R0–R15)
H L
b0
(R0–R15)
H L
b0
(R0–R15)
b0
(R0–R15)
b0
(R0–R15)
b0
(R0–R15)
b0
Appendix 4-2
SUMMARY OF PRECAUTIONS
Appendix 4.1 Precautions about the CPU
Data in memory
+0
HH
b31 b0
+0
H
b31 b0
+0
b31
+0
b31 b0 b7
+0
b31
+0
b31
+0
b31
+1 +2 +3
HL LH LL
b31
+1 +2 +3
L
b15
+1 +2 +3
H L
b16 b31
+1 +2 +3
+1 +2 +3
b8 b15
+1 +2 +3
b16 b23
+1 +2 +3
b24 b31
32180 Group User's Manual (Rev. 1.0)