HD6432138SW datasheet(124/1061 Pages) RENESAS

Part #	HD6432138SW

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

PDF	1061 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

Logo

124 / 1061 page

Section 2 CPU

Rev. 4.00 Jun 06, 2006 page 70 of 1004

REJ09B0301-0400

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.

HD6432138SW Datasheet(PDF) 124 Page - Renesas Technology Corp