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XTNETA1570MFP Datasheet(PDF) 6 Page - Texas Instruments |
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XTNETA1570MFP Datasheet(HTML) 6 Page - Texas Instruments |
6 / 68 page TNETA1570 ATM SEGMENTATION AND REASSEMBLY DEVICE WITH INTEGRATED 64BIT PCIHOST INTERFACE SDNS033B − JUNE 1995 − REVISED MAY 1996 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 Terminal Functions (Continued) cell-reassembly interface TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION Reassembly cell available RESCLAV 69 O (CMOS) PHY mode RESCLAV (TXFULL /TXCLAV) indicates that a transfer of a complete cell can be accepted. RESCLAV 69 (CMOS) ATM mode RESCLAV (RXENB) indicates that a valid byte RESDATA will be sent during the next clock cycle. Reassembly clock RESCLK 66 I (TTL) PHY mode RESCLK (TXCLK) is used to synchronize transfers on RESDATA. ATMCLK is used as the source for RESCLK. RESCLK 66 (TTL) ATM mode RESCLK (RXCLK) is used to synchronize transfers on RESDATA. ATMCLK is used as the source for RESCLK. RESDATA7 − 72 − 75, I Reassembly data RESDATA7 − RESDATA0 72 − 75, 77 − 80 I (TTL) PHY mode RESDATA7 − RESDATA0 (TXDATA). RESDATA7 is the MSB. RESDATA0 77 − 80 (TTL) ATM mode RESDATA7 − RESDATA0 (RXDATA). RESDATA7 is the MSB. Reassembly enable RESEN 67 I (TTL) PHY mode RESEN (TXENB) goes active low when RESDATA contains a valid byte. RESEN 67 I (TTL) ATM mode RESEN (RXEMPTY/RXCLAV) indicates that RESDATA will be sent during the next clock cycle. I Reassembly parity RESPAR 71 I (TTL) PHY mode RESPAR (TXPAR) is the odd-parity bit over RESDATA7 − RESDATA0. RESPAR 71 (TTL) ATM mode RESPAR (RXPAR) is the odd-parity bit over RESDATA7 − RESDATA0. O Reassembly parity error (not required by UTOPIA) RESPERR 81 O (CMOS) PHY mode RESPERR indicates that parity error is present at the previous rising edge of RESPERR 81 (CMOS) ATM mode RESPERR indicates that parity error is present at the previous rising edge of RESCLK. Reassembly start of cell RESSOC 70 I (TTL) PHY mode RESSOC (TXSOC) is received when RESDATA contains the first valid byte of the cell. RESSOC 70 (TTL) ATM mode RESSOC (RXSOC) is received when RESDATA contains the first valid byte of the cell. |
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