HD64F2145 Datasheet, PDF (68/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

• Two CPU operating modes
Normal mode
Advanced mode
• Power-down state
Transition to power-down state by SLEEP instruction
Selectable CPU clock speed
2.1.1 Differences between H8S/2600 CPU and H8S/2000 CPU
The differences between the H8S/2600 CPU and the H8S/2000 CPU are as shown below.
• Register configuration
The MAC register is supported only by the H8S/2600 CPU.
• Basic instructions
The four instructions MAC, CLRMAC, LDMAC, and STMAC are supported only by the
H8S/2600 CPU.
• The number of execution states of the MULXU and MULXS instructions
Instruction
MULXU
MULXS
Mnemonic
MULXU.B Rs, Rd
MULXU.W Rs, ERd
MULXS.B Rs, Rd
MULXS.W Rs, ERd
Execution States
H8S/2600
H8S/2000
3
12
4
20
4
13
5
21
In addition, there are differences in address space, CCR and EXR register functions, power-down
modes, etc., depending on the model.
2.1.2 Differences from H8/300 CPU
In comparison to the H8/300 CPU, the H8S/2000 CPU has the following enhancements.
• More general registers and control registers
Eight 16-bit extended registers and one 8-bit control register have been added.
• Expanded address space
Normal mode supports the same 64-kbyte address space as the H8/300 CPU.
Advanced mode supports a maximum 16-Mbyte address space.
• Enhanced addressing
The addressing modes have been enhanced to make effective use of the 16-Mbyte address
space.
Rev. 2.0, 08/02, page 28 of 788