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AC208-DS02-R 数据表(PDF) 25 Page - Broadcom Corporation. |
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AC208-DS02-R 数据表(HTML) 25 Page - Broadcom Corporation. |
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25 / 58 page ![]() Preliminary Data Sheet AC208 07/08/02 B roa dcom Document AC208-DS04-405-R Pin Descriptions Page 17 Table 10: Configuration and Setup Pin Name Pin # Type Description Mode[3] Mode[2] (LED_D[4]) Mode[1] (LED_D[1]) Mode[0] (LED_D[0]) 37 122 119 118 I,D Mode[1:0] Domain A Domain B 00 100M Rptr 10M Rptr (Master) 01 100M Rptr 10M Rptr (Slave, Bridge disable) 10 100M Port 7 11 100M Rptr 10M Rptr (Slave, Bridge, enable and 10M disable) Mode[3:2] MII Reserved TP125 36 I 1:select 1:1.25 xformer ChipID[0] (LED_D[3]) ChipID[1] (LED_D[2]) 120 121 I,D To assign chip ID for four devices in a single box. One device in the box must be assigned with ChipID = 0. RBP 112 I Reference bias resistor. Connected to analog ground through a 10K (1%) resistor. Table 11: Clock Reset Pin Name Pin # Type Description 1 RESET* 1 47 1 I,U 1 Reset to initial and defaulted state. Pulse must be greater than 10 ns. 1 CLK 1 48 1 I 1 25-MHz system clock reference input. This pin shall be connected to an external 25-MHz clock source. Multiple devices should be synchronous to the same external clock source. Table 12: Power and Ground Pin Name Pin # Type Description DVCC 115, 126, 10, 23, 39, 46 P 2.5V power for digital circuit, total of 9 pins. DGND 114, 116, 117, 5, 15, 32, 45, 49 G Ground for digital circuit, total 10 pins. AVCC 108, 109, 110, 57, 58, 59 P 2.5V power for analog circuit, total 16 pins. AGND 105, 62, 65, 66, 69, 74, 77, 78, 81, 86, 89, 90, 93, 98, 101, 102 G Ground for analog circuit, total 16 pins GAVDD 113 P 2.5V power supply for common analog circuit GAGND 111, 56 G Ground for common analog circuit Table 13: No Connects Pin Name Pin # Type Description N/C 17, 28, 29, 30, 31, 33, 34, 35, 38, 40, 41, 42, 43, 44 N/C No Connects |
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