KS8001
Pin Number
18
Pin Name
TXD1/
TXD[1]/
SYNC
TXD2
TXD3
COL /
RMII_SELECT
Micrel
Type
(Note 1)
Ipd
Pin Function
MII Mode: Transmit Data Input[1] /
RMII Mode: Transmit Data Input[1] /
SMII Mode: SYNC
MII Transmit Data Input[2]
MII Transmit Data Input[3]
MII Collision Detect Output
Configuration Mode: The pull-up/pull-down value is latched as RMII select
during reset. See “Strapping Options” section for details.
MII Carrier Sense Output
Configuration Mode: The pull-up/pull-down value is latched as RMII Loop-
back during reset when RMII mode is selected. See “Strapping Options
section” for details.
Ground
Digital IO 2.5 / 3.3V tolerance power supply
Management Interface (MII) Interrupt Out.
Configuration Mode: Latched as PHYAD[0] during power up / reset. See
“Strapping Options” section for details.
Programmable LED Output 0
Configuration Mode: The external pull down enable test mode and only used
for tfactory test. Active Low. The LED0 pin is also programmable via register
1eh.
LED mode = 00
Link/Act
No Link
Link
Activity
LED mode = 01
Link
No Link
Link
LED mode = 10
10Mbps Link
No Link
Pin State
H
LED Definition
Off
Pin State
H
L
LED Definition
Off
On
Pin State
H
L
-
LED Definition
Off
On
Toggle
19
20
21
Ipd
Ipd
Ipd/O
22
CRS/
RMII_BTB
Ipd/O
23
24
25
GND
VDDIO
INT#/
PHYAD0
LED0/
TEST
Gnd
Pwr
Ipu/O
26
Ipu/O
27
LED1 /
SPD100/
noFEF
Ipu/O
Link
L
On
Programmable LED Output 1
Configuration Mode: Latched as SPEED (Register 0, bit 13) during power up
/ reset. See “Strapping Options” Section for details. Active Low. The LED1
pin is also programmable via register 1eh.
LED mode = 00
Speed
10BT
100BT
LED mode = 01
Speed
10BT
100BT
Pin State
H
L
LED Definition
Off
On
Pin State
H
L
LED Definition
Off
On
May 2005 – SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
KS8001
MICREL CONFIDENTIAL. DO NOT DISTRIBUTE.
7
MICREL [ MICREL SEMICONDUCTOR ]
