Datasheet
Table 2.4 Miscellaneous Pins (continued)
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| BUFFER |
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NUM PINS | NAME | SYMBOL | TYPE |
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| Ethernet Link | nLNKA_LED | OD12 | Ethernet Link Activity Indicator LED (Active- | |
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| Activity |
| (PU) | Low): This signal is driven low (LED on) when a | |
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| Indicator LED |
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| valid link is detected. This pin is pulsed high (LED | |
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| off) for 80mS whenever transmit or receive | |
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| activity is detected. This pin is then driven low | |
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| again for a minimum of 80mS, after which time it | |
1 |
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| will repeat the process if TX or RX activity is | |
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| detected. Effectively, LED2 is activated solid for a | ||
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| link. When transmit or receive activity is sensed, | |
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| LED2 will function as an activity indicator. | |
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| General | GPIO9 | IS/O12/ | General Purpose I/O 9 | |
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| Purpose I/O 9 |
| OD12 | Note: | By default this pin is configured as a |
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| (PU) | ||
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| GPIO. | |
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| Ethernet | nSPD_LED | OD12 | Ethernet Speed Indicator LED | |
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| Speed |
| (PU) | This pin is driven low (LED on) when the Ethernet | |
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| Indicator LED |
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| operating speed is 100Mbs, or during auto- | |
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| negotiation. This pin is driven high during 10Mbs | |
1 |
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| operation, or during line isolation. | |
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| General | GPIO10 | IS/O12/ | General Purpose I/O 10 | |
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| Purpose I/O |
| OD12 | Note: | By default this pin is configured as a |
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| 10 |
| (PU) | ||
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| GPIO. | ||
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| Detect | VBUS_DET | IS_5V | Detect Upstream VBUS Power: Detects state of | |
1 |
| Upstream |
| (PD) | upstream bus power. This pin must be tied to | |
| VBUS Power |
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| VDD33IO when operating in bus powered mode. | ||
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1 |
| Test 1 | TEST1 | - | Test 1: This pin must always be connected to | |
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| VDD33IO for proper operation. | ||
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1 |
| Test 2 | TEST2 | - | Test 2: This pin must always be connected to | |
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| VSS for proper operation. | ||
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1 |
| Test 3 | TEST3 | - | Test 3: This pin must always be connected to | |
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| VSS for proper operation. | ||
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SMSC LAN9500/LAN9500i | 15 | Revision 1.7 |
| DATASHEET |
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