Differences Between H8S/2600 Cpu And H8S/2000 Cpu - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

• Two CPU operating modes
 Normal mode*
 Advanced mode
Note: For this LSI, normal mode is not available.
• 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
In addition, there are differences in address space, CCR and EXR register functions, power-down
modes, etc., depending on the model.
Rev. 1.0, 09/01, page 18 of 904
Mnemonic
MULXU.B Rs, Rd
MULXU.W Rs, ERd
MULXS.B Rs, Rd
MULXS.W Rs, ERd
Execution States
H8S/2600
3
4
4
5
H8S/2000
12
20
13
21