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TNETA1570 数据表(PDF) 16 Page - Texas Instruments |
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TNETA1570 数据表(HTML) 16 Page - Texas Instruments |
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16 / 68 page ![]() TNETA1570 ATM SEGMENTATION AND REASSEMBLY DEVICE WITH INTEGRATED 64BIT PCIHOST INTERFACE SDNS033B − JUNE 1995 − REVISED MAY 1996 16 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 timing requirements (see Figure 7) NO. MIN MAX UNIT 1 tsu(PIDSEL) Setup time, PIDSEL high before PCLK ↑ 7 ns 2 tsu(PAD) Setup time, PAD31 − PAD0 valid before PCLK ↑ 7 ns 3 tsu(PCBE) Setup time, PCBE3 − PCBE0 valid before PCLK ↑ 7 ns 4 tsu(PIRDY) Setup time, PIRDY low before PCLK ↑ 7 ns 5 th(PIDSEL) Hold time, PIDSEL high after PCLK ↑ 1 ns 6 th(PAD) Hold time, PAD31 − PAD0 valid after PCLK ↑ 2 ns 7 th(PCBE) Hold time, PCBE3 − PCBE0 valid after PCLK ↑ 1 ns 8 th(PIRDY) Hold time, PIRDY low after PCLK ↑ 1 ns operating characteristics (see Figure 7) NO. MIN MAX UNIT 9 td(PAD) Delay time, PCLK ↑ to PAD31−PAD0 valid 2 11 ns 10 td(PTRDY) Delay time, PCLK ↑ to PTRDY↓ 2 11 ns 11 td(PDEVSEL) Delay time, PCLK ↑ to PDEVSEL↓ 2 11 ns PCLK (input) PIDSEL (input) PAD31− PAD0 (I/O) PFRAME (input) PCBE3− PCBE0 (input) PIRDY (input) PTRDY (output) PDEVSEL (output) Address Bus Cmd 5 1 7 BE 3 Data 8 Address Phase 6 2 4 10 Data Phase 9 11 Figure 7. TNETA1570 Read Operation (PCI SAR as Slave) |
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