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H8S/2214 Scheda tecnica(PDF) 125 Page - Renesas Technology Corp |
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H8S/2214 Scheda tecnica(HTML) 125 Page - Renesas Technology Corp |
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125 / 936 page ![]() Section 2 CPU Rev.4.00 Sep. 18, 2008 Page 65 of 872 REJ09B0189-0400 Bus cycle T1 T2 Unchanged Address bus AS RD HWR, LWR Data bus φ High High High High-impedance state Figure 2.21 Pin States during On-Chip Supporting Module Access 2.9.4 External Address Space Access Timing 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 Usage Notes 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 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. |
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