Micrel, Inc.
KSZ9021RL/RN
Mode(1)
Address
Name
Description
Default
10.14
MASTER-
SLAVE
1 = Local PHY configuration resolved to
MASTER
RO
0
configuration
resolution
0 = Local PHY configuration resolved to
SLAVE
10.13
10.12
Local
Receiver
Status
1 = Local Receiver OK (loc_rcvr_status = 1)
0 = Local Receiver not OK (loc_rcvr_status = 0)
RO
RO
0
0
Remote
Receiver
Status
1 = Remote Receiver OK (rem_rcvr_status = 1)
0 = Remote Receiver not OK (rem_rcvr_status
= 0)
10.11
A.10
LP 1000T FD
LP 1000T HD
Reserved
1 = Link Partner is capable of 1000Base-T full-
duplex
RO
RO
0
0
0 = Link Partner is not capable of 1000Base-T
full-duplex
1 = Link Partner is capable of 1000Base-T half-
duplex
0 = Link Partner is not capable of 1000Base-T
half-duplex
10.9:8
10.7:0
RO
00
Idle Error
Count
Cumulative count of errors detected when
receiver is receiving idles and
RO/SC
0000_0000
PMA_TXMODE.indicate = SEND_N.
The counter is incremented every symbol
period that rxerror_status = ERROR.
Register 11 (Bh) – Extended Register – Control
11.15
Extended
Register –
read/write
select
1 = Write Extended Register
0 = Read Extended Register
RW
0
11.14:9
11.8
Reserved
RW
RW
000_000
0
Extended
Register –
page
Select page for Extended Register
Select Extended Register Address
11.7:0
Extended
Register –
address
RW
0000_0000
Register 12 (Ch) – Extended Register – Data Write
12.15:0
Extended
Register –
write
16-bit value to write to Extend Register Address RW
in register 11 (Bh) bits [7:0]
0000_0000_0000_0000
Register 13 (Dh) – Extended Register – Data Read
13.15:0
Extended
Register –
read
16-bit value read from Extend Register Address RO
in register 11 (Bh) bits [7:0]
0000_0000_0000_0000
Register 15 (Fh) – Extended – MII Status
15.15
1000Base-X
Full-duplex
1 = PHY able to perform 1000Base-X
full-duplex
RO
0
0 = PHY not able to perform 1000Base-X
full-duplex
M9999-101309-1.1
October 2009
40
MICREL [ MICREL SEMICONDUCTOR ]
