Micrel KSZ8895 Specifications Page 16

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Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Pin Description
Pin Number Pin Name Type
(1)
Port Pin Function
(2)
1 MDI-XDIS IPD
1 5
Disable auto MDI/MDI-X.
PD (default) = normal operation.
PU = disable auto MDI/MDI-X on all ports.
2 GNDA GND Analog ground.
3 VDDAR P 1.2V analog V
DD
.
4 RXP1 I 1 Physical receive signal + (differential).
5 RXM1 I 1 Physical receive signal - (differential).
6 GNDA GND Analog ground.
7 TXP1 O 1 Physical transmit signal + (differential).
8 TXM1 O 1 Physical transmit signal - (differential).
9 VDDAT P 3.3V analog V
DD
.
10 RXP2 I 2 Physical receive signal + (differential).
11 RXM2 I 2 Physical receive signal - (differential).
12 GNDA GND Analog ground.
13 TXP2 O 2 Physical transmit signal + (differential).
14 TXM2 O 2 Physical transmit signal - (differential).
15 VDDAR P 1.2V analog V
DD
.
16 GNDA GND Analog ground.
17 ISET
Set physical transmit output current. Pull-down with a
12.4kΩ1% resistor.
18 VDDAT P 3.3V analog V
DD
.
19 RXP3 I 3 Physical receive signal + (differential).
20 RXM3 I 3 Physical receive signal - (differential).
21 GNDA GND Analog ground.
22 TXP3 O 3 Physical transmit signal + (differential).
23 TXM3 O 3 Physical transmit signal (differential).
24 VDDAT P 3.3V analog V
DD
.
25 RXP4 I 4 Physical receive signal + (differential).
26 RXM4 I 4 Physical receive signal - (differential).
27 GNDA GND Analog ground.
28 TXP4 O 4 Physical transmit signal + (differential).
29 TXM4 O 4 Physical transmit signal - (differential).
30 GNDA GND Analog ground.
31 VDDAR P 1.2V analog V
DD
.
32 RXP5 I 5 Physical receive signal + (differential).
33 RXM5 I 5 Physical receive signal - (differential).
34 GNDA GND Analog ground.
35 TXP5 O 5 Physical transmit signal + (differential).
36 TXM5 O 5 Physical transmit signal - (differential).
37 VDDAT P 3.3V analog V
DD
.
38 FXSD3 IPD 3
FMQ: Fiber signal detect pin for Port 3.
MQ/RQ: no connection.
March 12, 2014
16
Revision 1.7
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