Micrel, Inc.
KSZ8993M/ML
Pin Number
Pin Name
RXP1
Type (1)
I/O
I/O
Gnd
I/O
I/O
P
Description
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
Physical receive or transmit signal (+ differential)
Physical receive or transmit signal (– differential)
Analog ground
RXM1
AGND
TXP1
Physical transmit or receive signal (+ differential)
Physical transmit or receive signal (– differential)
3.3V analog VDD
TXM1
VDDATX
VDDARX
RXM2
RXP2
P
3.3V analog VDD
I/O
I/O
Gnd
I/O
I/O
P
Physical receive or transmit signal (– differential)
Physical receive or transmit signal (+ differential)
Analog ground.
AGND
TXM2
Physical transmit or receive signal (– differential)
Physical transmit or receive signal (+ differential)
1.8 analog VDD
TXP2
VDDA
AGND
TEST1
TEST2
ISET
Gnd
I
Analog ground
Factory test pin - float for normal operation
Factory test pin - float or pull-up for normal operation
Set physical transmit output current.
Pull-down this pin with a 3.01K 1% resistor to ground.
Analog ground
Ipu
O
62
63
64
65
66
AGND
VDDAP
AGND
X1
Gnd
P
1.8V analog VDD for PLL
Gnd
I
Analog ground.
25MHz crystal/oscillator clock connections
X2
O
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.
67
68
RST_N
BPEN
Ipu
Ipd
Hardware reset pin (active low)
Half-duplex backpressure
1 = enable
0 = disable
69
SMAC
Ipd
Special Mac-mode
In this mode, the switch will do faster back-offs than normal.
1 = enable
0 = disable
Note:
1. P = Power supply.
Gnd = Ground.
I = Input.
O = Output.
Ipu = Input w/ internal pull-up.
Ipd = Input w/ internal pull-down.
October 2008
13
M9999-020606
MICREL [ MICREL SEMICONDUCTOR ]
