p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 60

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
2.2.2
• Address space
• Extended registers (En)
• Instruction set
• Exception vector table and memory indirect branch addresses
Rev. 1.00 Sep. 21, 2006 Page 22 of 658
REJ09B0310-0100
Linear access to a maximum address space of 16 Mbytes is possible.
The extended registers (E0 to E7) can be used as 16-bit registers. They can also be used as the
upper 16-bit segments of 32-bit registers or address registers.
All instructions and addressing modes can be used.
In advanced mode, the top area starting at H'00000000 is allocated to the exception vector
table in 32-bit units. In each 32 bits, the upper eight bits are ignored and a branch address is
stored in the lower 24 bits (see figure 2.3). For details of the exception vector table, see section
4, Exception Handling.
Advanced Mode
H'00000000
H'00000003
H'00000004
H'00000007
H'00000008
H'0000000B
H'0000000C
H'00000010
Figure 2.3 Exception Vector Table (Advanced Mode)
(Reserved for system use)
(Reserved for system use)
Reset exception vector
Exception vector 1
Reserved
Reserved
Reserved
Exception vector table