Micrel, Inc.
KSZ9021RL/RN
Mode(1)
Address
Name
Description
Default
259.4
NAND Tree
1 = Strap to NAND Tree mode
RO
strap-in status
259.3:0
Reserved
RO
Register 260 (104h) – RGMII Clock and Control Pad Skew
260.15:12
260.11:8
260.7:4
rxc_pad_skew
RGMII RXC PAD Skew Control (0.2ns/step)
RW
0111
0111
0111
0111
rxdv_pad_skew RGMII RX_CTL PAD Skew Control (0.2ns/step) RW
txc_pad_skew
RGMII TXC PAD Skew Control (0.2ns/step)
RW
RW
260.3:0
txen_pad_skew RGMII TX_CTL PAD Skew Control (0.2ns/step)
Register 261 (105h) – RGMII RX Data Pad Skew
261.15:12
261.11:8
261.7:4
rxd3_pad_skew RGMII RXD3 PAD Skew Control (0.2ns/step)
RW
RW
RW
RW
0111
0111
0111
0111
rxd2_pad_skew RGMII RXD2 PAD Skew Control (0.2ns/step)
rxd1_pad_skew RGMII RXD1 PAD Skew Control (0.2ns/step)
rxd0_pad_skew RGMII RXD0 PAD Skew Control (0.2ns/step)
261.3:0
Register 263 (107h) – Analog Test Register
263.15
LDO disable
1 = LDO controller disable
0 = LDO controller enable
RW
0
263.14:9
263.8
Reserved
RW
RW
000_000
0
Low frequency
oscillator mode
1 = Low frequency oscillator mode enable
0 = Low frequency oscillator mode disable
Use for further power saving during software
power down.
263.7:0
Reserved
RW
0000_0000
Note:
1. RW = Read/Write.
RO = Read only.
M9999-101309-1.1
October 2009
45
MICREL [ MICREL SEMICONDUCTOR ]
