Micrel, Inc. KS8995XA Pin Number Pin Name Type(1) 31 VDDAR P 32 RXP5 I 5 Physical receive signal + (differential). 5 Physical receive signal – (differential). Port Pin Function(2) 1.8V analog VDD. 33 RXM5 I 34 GNDA Gnd 35 TXP5 O 5 Physical transmit signal + (differential). 36 TXM5 O 5 Physical transmit signal – (differential). 37 VDDAT P 38 FXSD5 I 5 Fiber signal detect/factory test pin. 39 FXSD4 I 4 Fiber signal detect/factory test pin. 40 GNDA Gnd 41 VDDAR P 42 GNDA Gnd 43 VDDAR P 44 GNDA Gnd 45 NC / MUX1 I No connect. Factory test pin. 46 NC / MUX2 I No connect. Factory test pin. 47 PWRDN_N Ipu 48 RESERVE/NC 49 GNDD Gnd 50 VDDC P 51 PMTXEN Ipd 5 PHY[5] MII transmit enable. 52 PMTXD3 Ipd 5 PHY[5] MII transmit bit 3. 53 PMTXD2 Ipd 5 PHY[5] MII transmit bit 2. 54 PMTXD1 Ipd 5 PHY[5] MII transmit bit 1. 55 PMTXD0 Ipd 5 PHY[5] MII transmit bit 0. 56 PMTXER Ipd 5 PHY[5] MII transmit error. 57 PMTXC O 5 PHY[5] MII transmit clock. PHY mode MII. 58 GNDD Gnd 59 VDDIO P 60 PMRXC O Analog ground. 2.5V or 3.3V analog VDD. Analog ground. 1.8V analog VDD. Analog ground. 1.8V analog VDD. Analog ground. Full-chip power down. Active low. Reserved pin. No connect. Digital ground. 1.8V digital core VDD. Digital ground. 3.3V digital VDD for digital I/O circuitry. 5 PHY[5] MII receive clock. PHY mode MII. Notes: 1. P = Power supply. I = Input. O = Output. I/O = Bidirectional. Gnd = Ground. Ipu = Input w/internal pull-up. Ipd = Input w/internal pull-down. Ipd/O = Input w/internal pull-down during reset, output pin otherwise. Ipu/O = Input w/internal pull-up during reset, output pin otherwise. 2. PU = Strap pin pull-up. PD = Strap pull-down. Otri = Output tristated. September 2008 10 M9999-091508
