h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 55

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

In addition, there are differences in address space, CCR and EXR register functions, power-down
modes, etc., depending on the model.
2.1.3
In comparison to the H8/300 CPU, the H8S/2600 CPU has the following enhancements.
• More general registers and control registers
• Expanded address space
Note: * Not available in the H8S/2646 Group.
• Enhanced addressing
• Enhanced instructions
• Higher speed
2.1.4
In comparison to the H8/300H CPU, the H8S/2600 CPU has the following enhancements.
• Additional control register
• Enhanced instructions
 Eight 16-bit expanded registers, and one 8-bit and two 32-bit control registers, have been
 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
 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 instructions have been added.
 Instructions for saving and restoring multiple registers have been added.
 A test and set instruction has been added.
 Basic instructions execute twice as fast.
 One 8-bit and two 32-bit control registers have been added.
 Addressing modes of bit-manipulation instructions have been enhanced.
 A multiply-and-accumulate instruction has been added.
added.
space.
Differences from H8/300 CPU
Differences from H8/300H CPU
Rev. 5.00 Sep 22, 2005 page 29 of 1136
REJ09B0257-0500
Section 2 CPU