HD6432142 datasheet(126/1177 Pages) RENESAS

Il numero della parte	HD6432142

Spiegazioni elettronici	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1177 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 2 CPU

Rev. 4.00 Sep 27, 2006 page 82 of 1130

REJ09B0327-0400

2.10

Usage Note

2.10.1

TAS Instruction

Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction. The TAS

instruction is not generated by the Renesas H8S and H8/300 series C/C++ compilers. If the TAS

instruction is used as a user-defined intrinsic function, ensure that only register ER0, ER1, ER4, or

ER5 is used.

2.10.2

STM/LDM Instruction

ER7 is not used as the register that can be saved (STM)/restored (LDM) when using STM/LDM

instruction, because ER7 is the stack pointer. Two, three, or four registers can be saved/restored by

one STM/LDM instruction. The following ranges can be specified in the register list.

Two registers: ER0—ER1, ER2—ER3, or ER4—ER5

Three registers: ER0—ER2, or ER4—ER6

Four registers: ER0—ER3

The STM/LDM instruction including ER7 is not generated by the Renesas H8S and H8/300 series

C/C++compilers.

HD6432142 Scheda tecnica(PDF) 126 Page - Renesas Technology Corp