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KSZ8873MLLJ Datasheet(PDF) 11 Page - Micrel Semiconductor |
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KSZ8873MLLJ Datasheet(HTML) 11 Page - Micrel Semiconductor |
11 / 108 page Micrel, Inc. KSZ8873MLLJ September 2011 11 M9999-091911-1.8 Pin Description and I/O Assignment Pin Number Pin Name Type (1) Description 1 RXM1 I/O Physical receive or transmit signal (– differential) 2 RXP1 I/O Physical receive or transmit signal (+ differential) 3 AGND GND Analog ground 4 TXM1 I/O Physical transmit or receive signal (– differential) 5 TXP1 I/O Physical transmit or receive signal (+ differential) 6 VDDA_3.3 P 3.3V analog VDD 7 AGND GND Analog ground. 8 ISET O Set physical transmit output current. Pull-down this pin with a 11.8K 1% resistor to ground. 9 VDDA_1.8 P 1.8V analog core power input from VDDCO (pin 56). 10 RXM2 I/O Physical receive or transmit signal (– differential) 11 RXP2 I/O Physical receive or transmit signal (+ differential) 12 AGND GND Analog ground. 13 TXM2 I/O Physical transmit or receive signal (– differential) 14 TXP2 I/O Physical transmit or receive signal (+ differential) 15 FXSD2 I MLLJ: Floating or connect to analog ground by pull-down resistor. 16 PWRND IPU Chip power down input (active low). 17 X1 I 18 X2 O 25 or 50MHz crystal/oscillator clock connections. Pins (X1, X2) connect to a crystal. If an oscillator is used, X1 connects to a 3.3V tolerant oscillator and X2 is a no connect. Note: Clock is +/- 50ppm for both crystal and oscillator, the clock should be applied to X1 pin before reset voltage goes high. 19 SMTXEN3 I Switch MII transmit enable 20 SMTXD33/ EN_REFCLKO_3 IPU/I MLLJ: Switch MII transmit data bit 3 21 SMTXD32/ NC I MLLJ: Switch MII transmit data bit 2 22 SMTXD31 I Switch MII transmit data bit 1 23 SMTXD30 I Switch MII transmit data bit 0 24 GND GND Digital ground 25 VDDIO P 3.3V, 2.5V or 1.8V digital VDD input power supply for IO with well decoupling capacitors. 26 SMTXC3/ REFCLKI_3 I/O MLLJ: Switch MII transmit clock (MII modes only) Output in PHY MII mode and SNI mode Input in MAC MII. 27 SMTXER3/ MII_LINK_3 IPD Switch MII transmit error in MII mode 0= MII link indicator from host in MII PHY mode. 1= No link on port 3 MII PHY mode and enable By-pass mode. |
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