Micrel, Inc.
Pin #
Pin Name
Type
Description
KS8993F/FL
19
20
P1LPBM
P2LED3
Ipd
Opd
CRC, undersize, oversize. Loop back Ethernet frames with only good
CRC and valid length.
0 = Drop OAM frames only. Loop back all Ethernet frames including those
with errors.
0 = perform MC loop back at MAC of port 2
1 = reserve. Do not use.
Port 2 LED Indicator
Note: Internal pull down is weak; it will not turn ON the LED.
See description in pin# (4).
Digital ground
VDDC : For KS8993F, this is an input power pin for the 1.8V digital
core VDD.
VOUT_1V8 : For KS8993FL, this is an 1.8V output power pin to
supply the KS8993FL’s input power pins: VDDAP
(pin 63), VDDC (pins 91, 123) and VDDA (pins 38, 43, 57).
21
22
DGND
VDDC / VOUT_1V8
Gnd
Pwr
23
LEDSEL1
I
pd
LED display mode select
See description in pin# (1,4).
Reserved
Port 1 LED Indicator
Note: An external 1K pull down is needed on this pin if it is connected
to a LED.
See description in pin# (1).
Reserved
Hardware Pin Overwrite
0 = Disable. All strap-in pins configurations are overwritten by the
EEPROM configuration data.
1 = Enable. All strap-in pins configurations are overwritten by the
EEPROM configuration data, except for P2ANEN (pin 13), P2SPD
(pin 14), P2DPX (pin 15) and ML_EN (pin 34).
Port 2 auto MDI/MDI-X
0 = enable (default)
1 = disable
Port 2 MDI/MDI-X setting when auto MDI/MDI-X is disabled
0 = MDI-X (default), {transmit on TXP2/TXM2 pins}
1 = MDI, {transmit on RXP2/RXM2 pins}
1 = enable auto negotiation on port 1
0 = disable auto negotiation on port 1
1 = Force port 1 to 100BT if P1ANEN = 0.
0 = Force port 1 to 10BT if P1ANEN = 0.
1 = port 1 default to full duplex mode if P1ANEN = 1 and auto negotiation
fails. Force port 1 in full duplex mode if P1ANEN = 0.
0 = port 1 default to half duplex mode if P1ANEN = 1 and auto negotiation
fails. Force port 1 in half duplex mode if P1ANEN = 0.
1 = always enable (force) port 1 flow control feature
0 = port 1 flow control feature enable is determined by auto negotiation
result.
1 = enable missing link
M9999-062509
hbwhelp@micrel.com
or (408) 955-1690
24
25
NC
P1LED3
O
pd
O
pd
26
27
NC
HWPOVR
O
pd
Ipd
28
P2MDIXDIS
Ipd
29
P2MDIX
Ipd
30
31
32
P1ANEN
P1SPD
P1DPX
Ipu
Ipd
Ipd
33
P1FFC
Ipd
34
ML_EN
Ipd
June 2009
12
MICREL [ MICREL SEMICONDUCTOR ]
