r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 71

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Note:
2.1.2
In comparison to the H8/300 CPU, the H8S/2600 CPU has the following enhancements.
• More general registers and control registers
• Expanded address space
• Enhanced addressing
• Enhanced instructions
Instruction
MULXU
MULXS
CLRMAC
LDMAC
STMAC
Eight 16-bit expanded registers, and one 8-bit and two 32-bit control registers, have been
added.
Normal mode supports the same 64-Kbyte address space as the H8/300 CPU.
Advanced mode supports a maximum 16-Mbyte address space.
The addressing modes have been enhanced to make effective use of the 16-Mbyte address
space.
Addressing modes of bit-manipulation instructions have been enhanced.
Signed multiply and divide instructions have been added.
A multiply-and-accumulate instruction has been added.
Two-bit shift and rotate instructions have been added.
Instructions for saving and restoring multiple registers have been added.
A test and set instruction has been added.
*
Differences from H8/300 CPU
The number of execution states is incremented following a MAC instruction.
In addition, there are differences in address space, CCR and EXR register functions,
power-down modes, etc., depending on the model.
Mnemonic
MULXU.B Rs, Rd
MULXU.W Rs, ERd
MULXS.B Rs, Rd
MULXS.W Rs, ERd
CLRMAC
LDMAC ERs, MACH
LDMAC ERs, MACL
STMAC MACH, ERd
STMAC MACL, ERd
Execution States
H8S/2600
2*
2*
3*
3*
1*
1*
1*
1*
1*
Rev. 1.00 Sep. 19, 2008 Page 43 of 1270
H8S/2000
12
20
13
21
Not supported
REJ09B0466-0100
Section 2 CPU