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SH7014 데이터시트(PDF) 157 Page - Renesas Technology Corp |
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SH7014 데이터시트(HTML) 157 Page - Renesas Technology Corp |
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157 / 754 page ![]() 8. Bus State Controller (BSC) Rev.5.00 Sep. 27, 2007 Page 123 of 716 REJ09B0398-0500 8.3 Accessing Ordinary Space A strobe signal is output by ordinary space accesses to provide primarily for SRAM or ROM direct connections. 8.3.1 Basic Timing Figure 8.3 shows the basic timing of ordinary space accesses. Ordinary access bus cycles are performed in 2 states. T1 CK Address CSn RD Read Write Data WRx Data T2 Figure 8.3 Basic Timing of Ordinary Space Access During a read, irrespective of operand size, all bits in the data bus width for the access space (address) are fetched by the LSI on RD, using the required byte locations. During a write, the following signals are associated with transfer of these actual byte locations: WRH (bits 15 to 8) and WRL (bits 7 to 0). |
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