h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 54

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
• High-speed operation
• Two CPU operating modes
Note: * Not available in the H8S/2646 Group.
• Power-down state
2.1.2
• Register configuration
• Basic instructions
• Number of execution states
Rev. 5.00 Sep 22, 2005 page 28 of 1136
REJ09B0257-0500
Instruction
MULXU
MULXS
The differences between the H8S/2600 CPU and the H8S/2000 CPU are as shown below.
 All frequently-used instructions execute in one or two states
 Maximum clock rate:
 8/16/32-bit register-register add/subtract: 50 ns
 8 × 8-bit register-register multiply:
 16 ÷ 8-bit register-register divide:
 16 × 16-bit register-register multiply:
 32 ÷ 16-bit register-register divide:
 Normal mode *
 Advanced mode
 Transition to power-down state by SLEEP instruction
 CPU clock speed selection
The MAC register is supported only by the H8S/2600 CPU.
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 is different in each
CPU.
Differences between H8S/2600 CPU and H8S/2000 CPU
Mnemonic
MULXU.B Rs, Rd
MULXU.W Rs, ERd
MULXS.B Rs, Rd
MULXS.W Rs, ERd
20 MHz
150 ns
600 ns
200 ns
1000 ns
H8S/2600
3
4
4
5
Execution States
H8S/2000
12
20
13
21