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APA600 データシート(PDF) 73 Page - Actel Corporation |
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APA600 データシート(HTML) 73 Page - Actel Corporation |
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73 / 178 page  ProASICPLUS Flash Family FPGAs v5.9 2-63 Asynchronous Write and Read to the Same Location Note: The plot shows the normal operation status. Figure 2-36 • Asynchronous Write and Read to the Same Location Table 2-60 • TJ = 0°C to 110°C; VDD = 2.3 V to 2.7 V for Commercial/Industrial TJ = –55°C to 150°C, VDD = 2.3 V to 2.7 V for Military/MIL-STD-883 Symbol txxx Description Min. Max. Units Notes ORDA New DO access from RB ↓ 7.5 ns ORDH Old DO valid from RB ↓ 3.0 ns OWRA New DO access from WB ↑ 3.0 ns OWRH Old DO valid from WB ↑ 0.5 ns RAWRS RB ↓ or RADDR from WB ↓ 5.0 ns RAWRH RB ↑ or RADDR from WB ↑ 5.0 ns Notes: 1. During an asynchronous read cycle, each write operation (synchronous or asynchronous) to the same location will automatically trigger a read operation which updates the read data. Refer to the ProASICPLUS RAM and FIFO Blocks application note for more information. 2. Violation or RAWRS will disturb access to the OLD data. 3. Violation of RAWRH will disturb access to the NEWER data. RB, RADDR OLD NEWER NEW t ORDA t ORDH t OWRH t RAWRH WB = {WRB+WBLKB} DO t OWRA t RAWRS |
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