HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 95
HD6432160
Manufacturer Part Number
HD6432160
Description
Hitachi 16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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2.7.8
This mode can be used by the JMP and JSR instructions. The instruction code contains an 8-bit
absolute address specifying a memory operand which contains a branch address. The upper bits of
the 8-bit absolute address are all assumed to be 0, so the address range is 0 to 255 (H'0000 to
H'00FF in normal mode, H'000000 to H'0000FF in advanced mode).
In normal mode, the memory operand is a word operand and the branch address is 16 bits long. In
advanced mode, the memory operand is a longword operand, the first byte of which is assumed to
be 0 (H'00). Note that the top area of the address range in which the branch address is stored is
also used for the exception vector area. For further details, refer to section 4, Exception Handling.
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 the instruction code to be
fetched at the address preceding the specified address. (For further information, see section 2.5.2,
Memory Data Formats.)
Figure 2.12 Branch Address Specification in Memory Indirect Addressing Mode
Memory Indirect—@@aa:8
Specified
by @aa:8
(a) Normal Mode
Branch address
Specified
by @aa:8
(b) Advanced Mode
Rev. 2.0, 08/02, page 55 of 788
Branch address
Reserved
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