HD6432621 Hitachi, HD6432621 Datasheet - Page 101
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
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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: * Cannot be set in the H8S/2626 Series or H8S/2623 Series.
Specified
by @aa:8
Note: * Not available in the H8S/2626 Series or H8S/2623 Series.
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
57
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