KSZ8995FQI Datasheet, PDF (15/89 Pages) Micrel Semiconductor – Integrated 5-Port 10/100 Managed Switch

Micrel, Inc.
KS8995MA/FQ
Pin Description − By Numbers (Continued)
Pin Number
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Pin Name
VDDAR
RXP5
RXM5
GNDA
TXP5
TXM5
VDDAT
FXSD5/FXSD3
FXSD4
GNDA
VDDAR
GNDA
VDDAR
GNDA
MUX1
Type⁽¹⁾
P
I
I
GND
O
O
P
Ipd
Ipd
GND
P
GND
P
GND
NC
Port
5
5
5
5
5/3
4
Pin Function
1.8V analog V_DD.
Physical receive signal + (differential).
Physical receive signal – (differential).
Analog ground.
Physical transmit signal + (differential).
Physical transmit signal – (differential).
3.3V analog V_DD. (2.5V or 3.3V is for B3 and previous chip revision)
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.
46
MUX2
NC
Mode
MUX1
Normal Operation
NC
47
PWRDN_N
Ipu
Full-chip power down. Active low.
48
RESERVE
NC
Reserved pin. No connect.
49
GNDD
GND
Digital ground.
50
VDDC
P
1.8V digital core V_DD.
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
Digital ground.
59
VDDIO
P
3.3V digital V_DD for digital I/O circuitry.
60
PMRXC
O
5 PHY[5] MII receive clock. PHY mode MII.
MUX2
NC
Note:
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.
October 2011
15
M9999-102611-3.0