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5222-DS02-R 数据表(PDF) 62 Page - Broadcom Corporation. |
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5222-DS02-R 数据表(HTML) 62 Page - Broadcom Corporation. |
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62 / 76 page ![]() BCM5222 Preliminary Data Sheet 7/20/04 Broadcom Corporation Page 50 Timing and AC Characteristics Document 5222-DS02-405-R Figure 7: MII Receive Start of Packet Timing (100BASE-TX) COL Deassert after RD ± (premature end) RX_COL_IDLE 130 240 ns Note: RXC minimum high and low times are guaranteed when RXEN is asserted or deasserted. The MII port will always tristate while RXEN is low. Table 37: MII 100BASE-TX Receive Timing (Cont.) Parameter Symbol Min Typical Max Unit RX_CRS RX_COL 3RD DATA SSD RX_RXDV NIBBLE * When transmit is active J4 J3 J2 K4 K3 K2 K1 K0 J1 J0 II II I I I 0 5 COL* RXDV RXD, RD ± RXC CRS RXER RXC_MAX_HI RXC_MAX_LO |
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