HD6432351 datasheet(59/1025 Pages) RENESAS

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Section 2 CPU

Rev. 3.00 Sep 15, 2006 page 25 of 988

REJ09B0330-0300

Exception Vector Table and Memory Indirect Branch Addresses: In normal mode the top area

starting at H'0000 is allocated to the exception vector table. One branch address is stored per 16

bits. The configuration of the exception vector table in normal mode is shown in figure 2.2. For

details of the exception vector table, see section 4, Exception Handling.

H'0000

H'0001

H'0002

H'0003

H'0004

H'0005

H'0006

H'0007

H'0008

H'0009

H'000A

H'000B

Power-on reset exception vector

Manual reset exception vector

Exception vector 1

Exception vector 2

Exception

vector table

(Reserved for system use)

Figure 2.2 Exception Vector Table (Normal Mode)

The memory indirect addressing mode (@@aa:8) employed in the JMP and JSR instructions uses

an 8-bit absolute address included in the instruction code to specify a memory operand that

contains a branch address. In normal mode the operand is a 16-bit word operand, providing a 16-

bit branch address. Branch addresses can be stored in the top area from H'0000 to H'00FF. Note

that this area is also used for the exception vector table.

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