HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 69

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

2.5.2
Figure 2.8 shows the data formats on memory. The H8/300H CPU can access word data and
longword data on memory, but word or longword data must begin at an even address. If an attempt
is made to access word or longword data at an odd address, no address error occurs but the least
significant bit of the address is regarded as 0, so the access starts at the preceding address. This
also applies to instruction fetches.
Data Type
Word data
Word data
Longword data
Legend:
ERn:
En:
Rn:
MSB:
LSB:
General register
General register E
General register R
Most significant bit
Least significant bit
Memory Data Formats
General
Register
Rn
En
ERn
Figure 2.7 General Register Data Formats (2)
MSB
MSB
15
31
Data Format
Rev.4.00 Aug. 20, 2007 Page 25 of 638
LSB
16
0
MSB
15
15
REJ09B0395-0400
2. CPU
LSB
LSB
0
0