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PC87373 数据表(PDF) 168 Page - National Semiconductor (TI) |
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PC87373 数据表(HTML) 168 Page - National Semiconductor (TI) |
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168 / 174 page ![]() 13.0 Device Characteristics (Continued) 168 www.national.com Revision 1.1 Extended Capabilities Port (ECP) Timing Forward Mode Reverse Mode Symbol Parameter Min Max Unit tECDSF Data Setup before STB Active 0 ns tECDHF Data Hold after BUSY Inactive 0 ns tECLHF BUSY Active after STB Active 75 ns tECHHF STB Inactive after BUSY Active1 1. Not tested. Guaranteed by design. 01 s tECHLF BUSY Inactive after STB Active1 035 ms tECLLF STB Active after BUSY Inactive 0 ns Symbol Parameter Min Max Unit tECDSR Data Setup before ACK Active 0 ns tECDHR Data Hold after AFD Active 0 ns tECLHR AFD Inactive after ACK Active 75 ns tECHHR ACK Inactive after AFD Inactive1 1. Not tested. Guaranteed by design. 035 ms tECHLR AFD Active after ACK Inactive1 01 s tECLLR ACK Active after AFD Active 0 ns PD7 −0 STB BUSY tECHHF tECHLF tECLLF tECDSF tECLHF tECDHF AFD PD7 −0 ACK AFD tECHHR tECHLR tECLLR tECDSR tECLHR tECDHR BUSY |
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