h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 105
h8s-2169
Manufacturer Part Number
h8s-2169
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2169.pdf
(1075 pages)
- Current page: 105 of 1075
- Download datasheet (6Mb)
2.9.5
The external address space is accessed with an 8-bit or 16-bit data bus width in a two-state or
three-state bus cycle. In three-state access, wait states can be inserted. For further details, refer to
section 6, Bus Controller.
2.10
2.10.1
Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction. The TAS
instruction is not generated by the Renesas Technology 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
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 Technology H8S and
H8/300 series C/C++compilers.
External Address Space Access Timing
Usage Note
TAS Instruction
STM/LDM Instruction
Rev. 3.00 Jan 18, 2006 page 77 of 1044
REJ09B0280-0300
Section 2 CPU
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