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TNETA1570 数据表(PDF) 12 Page - Texas Instruments |
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TNETA1570 数据表(HTML) 12 Page - Texas Instruments |
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12 / 68 page ![]() TNETA1570 ATM SEGMENTATION AND REASSEMBLY DEVICE WITH INTEGRATED 64BIT PCIHOST INTERFACE SDNS033B − JUNE 1995 − REVISED MAY 1996 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 timing requirements (see Note 6 and Figure 3) NO. MIN MAX UNIT 1 tw(RESCLKH) Pulse duration, RESCLK high 10 ns 2 tw(RESCLKL) Pulse duration, RESCLK low 10 ns 3 tsu(RESEN) Setup time, RESEN high before RESCLK ↑ 10 ns 4 tsu(RESSOC) Setup time, RESSOC high before RESCLK ↑ 10 ns 5 tsu(RESDATA) Setup time, RESDATA7 − RESDATA0 valid before RESCLK ↑ 10 ns 6 tsu(RESPAR) Setup time, RESPAR valid before RESCLK ↑ 10 ns 7 th(RESEN) Hold time, RESEN high after RESCLK ↑ 1 ns 8 th(RESSOC) Hold time, RESSOC high after RESCLK ↑ 1 ns 9 th(RESDATA) Hold time, RESDATA7 − RESDATA0 valid after RESCLK ↑ 1 ns 10 th(RESPAR) Hold time, RESPAR valid after RESCLK ↑ 1 ns NOTE 6: All output signals are generated on the rising edge of RESCLK. All input signals are sampled on the rising edge of RESCLK. operating characteristics (see Note 6 and Figure 3) NO. MIN MAX UNIT 11 td(RESCLAV) Delay time, RESCLK ↑ to RESCLAV↓ 1 20 ns 12 td(RESPERR)1 Delay time, RESCLK ↑ to RESPERR↓ 1 20 ns 13 td(RESPERR)2 Delay time, RESCLK ↑ to RESPERR↑ 1 20 ns NOTE 6: All output signals are generated on the rising edge of RESCLK. All input signals are sampled on the rising edge of RESCLK. RESDATA7− RESDATA0 (input) RESEN (input) RESCLK (input) 1 2 RESSOC (input) 7 3 RESCLAV (output) Byte 1 Byte 2 Byte 3 Byte 49 Input Ignored Byte 50 Byte 48 Byte 51 11 If necessary 4 8 5 9 RESPAR (input) 12 6 10 13 No Parity Error RESPERR (output) Parity Error Figure 3. Reassembly-Cell Interface (PHY/ATM High) |
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