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HD64F2638F20J Datasheet, PDF (77/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series | |||
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H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 2 CPU
In addition, there are differences in address space, CCR and EXR register functions, power-down
modes, etc., depending on the model.
2.1.3 Differences from H8/300 CPU
In comparison to the H8/300 CPU, the H8S/2600 CPU has the following enhancements.
⢠More general registers and control registers
⯠Eight 16-bit expanded registers, and one 8-bit and two 32-bit control registers, have been
added
⢠Expanded address space
⯠Normal mode* supports the same 64-kbyte address space as the H8/300 CPU
⯠Advanced mode supports a maximum 16-Mbyte address space
Note: * Not available in the chip.
⢠Enhanced addressing
⯠The addressing modes have been enhanced to make effective use of the 16-Mbyte address
space
⢠Enhanced instructions
⯠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
⢠Higher speed
⯠Basic instructions execute twice as fast
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 27 of 1458
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