Micrel, Inc.
KS8995MA/FQ
Pin Number
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
Pin Name
VDDAR
RXP5
RXM5
GNDA
TXP5
TXM5
VDDAT
FXSD5/FXSD3
FXSD4
GNDA
VDDAR
GNDA
VDDAR
GNDA
MUX1
MUX2
PWRDN_N
RESERVE
GNDD
VDDC
PMTXEN
PMTXD3
PMTXD2
PMTXD1
PMTXD0
PMTXER
PMTXC
GNDD
VDDIO
PMRXC
Type
(1)
P
I
I
Gnd
O
O
P
Ipd
Ipd
Gnd
P
Gnd
P
Gnd
NC
NC
Ipu
NC
Gnd
P
Ipd
Ipd
Ipd
Ipd
Ipd
Ipd
O
Gnd
P
O
Port
5
5
Pin Function
1.8V analog V
DD
.
Physical receive signal + (differential).
Physical receive signal – (differential).
Analog ground.
5
5
Physical transmit signal + (differential).
Physical transmit signal – (differential).
2.5V or 3.3V analog V
DD
.
Fiber signal detect pin. FXSD5 is for port 5 of the KS8995MA. FXSD3
is for port 3 of the KS8995FQ
Fiber signal detect pin for port 4.
Analog ground.
1.8V analog V
DD
.
Analog ground.
1.8V analog V
DD
.
Analog ground.
Factory test pins. MUX1 and MUX2 should be left unconnected for
normal operation
Mode
MUX1
MUX2
Normal Operation
NC
NC
Full-chip power down. Active low.
Reserved pin. No connect.
Digital ground.
1.8V digital core V
DD
.
5/3
4
5
5
5
5
5
5
5
PHY[5] MII transmit enable.
PHY[5] MII transmit bit 3.
PHY[5] MII transmit bit 2.
PHY[5] MII transmit bit 1.
PHY[5] MII transmit bit 0.
PHY[5] MII transmit error.
PHY[5] MII transmit clock. PHY mode MII.
Digital ground.
3.3V digital V
DD
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.
NC = No connect.
Semptember 2008
12
M9999-091508
MICREL [ MICREL SEMICONDUCTOR ]
