h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 66

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
2.5.2
Figure 2.10 shows the data formats in memory. The H8S/2600 CPU can access word data and
longword data in memory, however 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, an address error does not
occur, however the least significant bit of the address is regarded as 0, so access begins the
preceding address. This also applies to instruction fetches.
When ER7 is used as an address register to access the stack, the operand size should be word or
longword.
Rev. 3.00 Oct 04, 2005 page 26 of 598
REJ09B0155-0300
Memory Data Formats
Data Type
1-bit data
Byte data
Word data
Longword data
Figure 2.10 Memory Data Formats
Address
Address L
Address L
Address 2M
Address 2M+1
Address 2N
Address 2N+1
Address 2N+2
Address 2N+3
MSB
MSB
MSB
7
7
6
Data Format
5
4
3
2
1
LSB
LSB
LSB
0
0