Section 2 CPU
Rev. 3.00 Mar. 14, 2006 Page 20 of 804
REJ09B0104-0300
•
Two base registers
Vector base register
Short address base register
•
4-Gbyte address space
Program: 4 Gbytes
Data: 4
Gbytes
•
High-speed operation
All frequently-used instructions executed in one or two states
8/16/32-bit register-register add/subtract: 1 state
8
×
8-bit register-register multiply:
1 state
16
÷
8-bit register-register divide:
10 states
16
×
16-bit register-register multiply:
1 state
32
÷
16-bit register-register divide:
18 states
32
×
32-bit register-register multiply:
5 states
32
÷
32-bit register-register divide:
18 states
•
Four CPU operating modes
Normal mode
Middle mode
Advanced mode
Maximum mode
•
Power-down modes
Transition is made by execution of SLEEP instruction
Choice of CPU operating clocks
Notes: 1. Advanced mode is only supported as the CPU operating mode of the H8SX/1520
Group. Normal, middle, and maximum modes are not supported.
2. The multiplier and divider are supported by the H8SX/1520 Group.
3. In the H8SX/1520 Group, an instruction is fetched in 32-bit mode.
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