Micrel, Inc.
KSZ9021RL/RN
Mode(1)
Address
Name
Description
Default
9:15:13
Test Mode Bits Transmitter test mode operations
RW
000
[9.15:13]
[000]
Mode
Normal Operation
[001]
Test mode 1 –Transmit waveform
test
[010]
[011]
[100]
[101]
[110]
[111]
Test mode 2 –Transmit jitter test
in Master mode
Test mode 3 –Transmit jitter test
in Slave mode
Test mode 4 –Transmitter
distortion test
Reserved, operations not
identified
Reserved, operations not
identified
Reserved, operations not
identified
9.12
9.11
MASTER-
SLAVE
1 = Enable MASTER-SLAVE Manual
configuration value
RW
RW
0
0
Manual Config
Enable
0 = Disable MASTER-SLAVE Manual
configuration value
MASTER-
SLAVE
1 = Configure PHY as MASTER during
MASTER-SLAVE negotiation
Manual Config
Value
0 = Configure PHY as SLAVE during MASTER-
SLAVE negotiation
This bit is ignored if MASTER-SLAVE Manual
Config is disabled (register 9.12 = 0).
9.10
Port Type
1 = Indicate the preference to operate as
RW
0
multiport device (MASTER)
0 = Indicate the preference to operate as single-
port device (SLAVE)
This bit is valid only if the MASTER-SLAVE
Manual Config Enable bit is disabled (register
9.12 = 0).
9.9
1000Base-T
Full-Duplex
1 = Advertise PHY is 1000Base-T full-duplex
capable
RW
RW
1
0 = Advertise PHY is not 1000Base-T full-
duplex capable
9.8
1000Base-T
Half-Duplex
1 = Advertise PHY is 1000Base-T half-duplex
capable
Hardware Setting
0 = Advertise PHY is not 1000Base-T half-
duplex capable
9.7:0
Reserved
Write as 0, ignore on read
RO
Register 10 (Ah) – 1000Base-T Status
10.15
MASTER-
SLAVE
1 = MASTER-SLAVE configuration fault
detected
RO/LH/SC
0
configuration
fault
0 = No MASTER-SLAVE configuration fault
detected
M9999-101309-1.1
October 2009
39
MICREL [ MICREL SEMICONDUCTOR ]
