HD6432646 Hitachi, HD6432646 Datasheet - Page 62

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Note: * Not available in the H8S/2646 Series.
2.1.2
Instruction
MULXU
MULXS
28
The differences between the H8S/2600 CPU and the H8S/2000 CPU are as shown below.
High-speed operation
Two CPU operating modes
Power-down state
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.
Number of execution states
The number of execution states of the MULXU and MULXS instructions is different in each
CPU.
All frequently-used instructions execute in one or two states
Maximum clock rate
8/16/32-bit register-register add/subtract : 50 ns
8
16 ÷ 8-bit register-register divide
16
32 ÷ 16-bit register-register divide
Normal mode*
Advanced mode
Transition to power-down state by SLEEP instruction
CPU clock speed selection
Differences between H8S/2600 CPU and H8S/2000 CPU
8-bit register-register multiply
16-bit register-register multiply
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
Execution States
H8S/2600
3
4
4
5
H8S/2000
12
20
13
21