Micrel, Inc.
Pin #
Pin Name
Type
Description
KS8993F/FL
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
61
62
63
64
65
66
DIAGF
PWRDN
AGND
VDDA
AGND
MUX1
MUX2
AGND
VDDA
FXSD1
RXP1
RXM1
AGND
TXP1
TXM1
VDDATX
VDDARX
RXM2
RXP2
AGND
TXM2
TXP2
VDDA
AGND
TEST1
TEST2
ISET
AGND
VDDAP
AGND
X1
X2
Ipd
I
Gnd
Pwr
Gnd
I
I
Gnd
Pwr
I
I/O
I/O
Gnd
I/O
I/O
Pwr
Pwr
I/O
I/O
Gnd
I/O
I/O
Pwr
Gnd
I
I
O
Gnd
Pwr
Gnd
I
O
0 = disable missing link
1 = diagnostic fail
0 = diagnostic normal
Chip power down input (active low)
Analog ground
1.8V analog VDD
Analog ground
Factory test pin – float for normal operation
Factory test pin – float for normal operation
Analog ground
1.8V analog VDD
Fiber signal detect / factory test pin
Physical receive or transmit signal (+ differential)
Physical receive or transmit signal (- differential)
Analog ground
Physical transmit or receive signal (+ differential)
Physical transmit or receive signal (- differential)
3.3V analog VDD
3.3V analog VDD
Physical receive or transmit signal (– differential)
Physical receive or transmit signal (+ differential)
Analog ground
Physical transmit or receive signal (– differential)
Physical transmit or receive signal (+ differential)
1.8V analog VDD
Analog ground
Factory test pin – float for normal operation
Factory test pin – float for normal operation
Set physical transmit output current.
Pull down this pin with a 3.01K 1% resistor to ground.
Analog ground
1.8V analog VDD for PLL
Analog ground
25 MHz 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.
67
68
RST_N
BPEN
Ipu
Ipd
69
SMAC
Ipd
Hardware reset pin (active low)
Half Duplex Backpressure
1 = enable
0 = disable
Special Mac Mode
In this mode, the switch will do faster backoffs than normal.
70
LEDSEL0
Ipd
1 = enable
0 = disable
LED display mode select
See description in pin# (1,4).
Switch MII transmit enable
Switch MII transmit data bit 3
M9999-062509
hbwhelp@micrel.com
or (408) 955-1690
71
72
SMTXEN
SMTXD3
Ipd
Ipd
June 2009
13
MICREL [ MICREL SEMICONDUCTOR ]
