KSZ8091RNA Datasheet, PDF (36/62 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

KSZ8091RNA/RND
TABLE 4-4: VENDOR SPECIFIC REGISTER DESCRIPTIONS (CONTINUED)
Address Name
Description
Mode
Note 4-1
Default
Register 16h – Operation Mode Strap Override
16.15
PME for Wake-on-LAN
1 = Enable
PME Enable
0 = Disable
This bit works in conjunction with MMD Address
RW
1Fh, Reg. 0h, Bits [15:14] to define the output for
pins 18 and 23.
16.14:11
16.10
16.9
16.8:7
16.6
Reserved Reserved
RW
Reserved Reserved
RO
B-
1 = Override to disable broadcast (default setting)
CAST_OFF for PHY Address 0
RW
Override
If bit is ‘1’, PHY Address 0 is non-broadcast.
Reserved Reserved
RW
RMII B-to-B
Override
1 = Override strap-in for RMII back-to-back mode
(also set Bit 1 of this register to ‘1’).
RW
16.5
NAND Tree
Override
1 = Override to enable NAND tree mode.
RW
16.4:2
Reserved Reserved
RW
16.1
RMII
Override
1 = Override to enable RMII mode.
RW
16.0
Reserved Reserved
RW
Register 17h - Operation Mode Strap Status
17.15
Reserved Reserved
RO
17.14:13
PHYAD[1:0]
Strap-In Sta-
tus
[00] = Strap to PHY Address 00000b (0h)
[11] = Strap to PHY Address 00011b (3h)
The KSZ8091RNA/RND supports PHY addresses
0h and 3h only.
RO
17.12:2
Reserved Reserved
RO
17.1
RMII Strap-In
Status
1 = Strap to RMII mode
RO
17.0
Reserved Reserved
RO
Register 18h - Expanded Control
18.15:12 Reserved Reserved
RW
Energy-detect power-down mode
18.11
EDPD
Disabled
1 = Disable
0 = Enable
RW
See also Register 10h, Bit [4] for PLL off.
18.10:0
Reserved Reserved
RW
Register 1Bh – Interrupt Control/Status
1B.15
Jabber Inter- 1 = Enable jabber interrupt
rupt Enable 0 = Disable jabber interrupt
RW
1B.14
Receive
Error Inter-
rupt Enable
1 = Enable receive error interrupt
0 = Disable receive error interrupt
RW
Set by the PME_EN
strapping pin.
See the Strapping
Options section for
details.
000_0
0
0
0_0
0
0
0_00
1
0
—
Set by the
PHYAD[1:0] strap-
ping pin.
See the Strapping
Options section for
details.
—
—
—
0000
1
0000
0
0
DS00002298A-page 36
 2016 Microchip Technology Inc.