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Rev. 1.00, 05/04, page 14 of 544
• 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
Execution States
Instruction Mnemonic
H8S/2600 H8S/2000
MULXU.B Rs, Rd 3 12 MULXU
MULXU.W Rs, ERd 4 20
MULXS.B Rs, Rd 4 13 MULXS
MULXS.W Rs, ERd 5 21
In addition, there are differences in address space, CCR and EXR register functions, power-down
modes, etc., depending on the model.