h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 86

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
If an odd address is specified in word or longword memory access, or as a branch address, the
least significant bit is regarded as 0, causing data to be accessed or instruction code to be fetched
at the address preceding the specified address. (For further information, see section 2.5.2, Memory
Data Formats.)
2.7.2
Table 2.6 indicates how effective addresses are calculated in each addressing mode. In normal
mode * the upper 8 bits of the effective address are ignored in order to generate a 16-bit address.
Note: * Not available in the H8S/2646 Group.
Rev. 5.00 Sep 22, 2005 page 60 of 1136
REJ09B0257-0500
Specified
by @aa:8
Note: * Not available in the H8S/2646 Group.
Effective Address Calculation
Figure 2.13 Branch Address Specification in Memory Indirect Mode
(a) Normal Mode *
Branch address
Specified
by @aa:8
(b) Advanced Mode
Branch address
Reserved