KSZ8081MNX / KSZ8091MNX 10Base-T/100Base-TX Evaluation Board User’s Guide
Micrel, Inc.
August 15, 2012
Rev.
1.0
11/13
Jumper
Pin
Pin Name
Pin Function
J11 31
SPEED
(KSZ8081 only)
SPEED mode
Pull-up (default) = 100Mbps
Pull-down = 10Mbps
At the de-assertion of reset, this pin value is latched into
register 0h bit 13 as the Speed Select, and also is latched
into register 4h (Auto-Negotiation Advertisement) as the
Speed capability support.
J12 16
DUPLEX DUPLEX
mode
Pull-up (default) = Half Duplex
Pull-down = Full Duplex
At the de-assertion of reset, this pin value is latched into
register 0h bit 8 as the Duplex Mode.
J10 30
NWAYEN Nway
Auto-Negotiation Enable
Pull-up (default) = Enable Auto-Negotiation
Pull-down = Disable Auto-Negotiation
At the de-assertion of reset, this pin value is latched into
register 0h bit 12.
J25
19
B-CAST_OFF
Broadcast Off – for PHY Address 0
Pull-up = PHY Address 0 is set as a unique PHY
address
Pull-down (default) = PHY Address 0 is set as a
broadcast PHY address
At the de-assertion of reset, this pin value is latched by the
chip.
J26 22
PME_EN
(KSZ8091 only)
PME_N Output Pin for Wake-On-LAN Function
Pull-up = Enable
Pull-down = Disable
At the de-assertion of reset, this pin value is latched into the
chip.
N/A
21
NAND_Tree#
NAND Tree Mode
Pull-up (default) = Disable
Pull-down = Enable
At the de-assertion of reset, this pin value is latched by the
chip.
Table 5. Strapping Pin Definitions for KSZ8081MNX-EVAL / KSZ8091MNX-EVAL Jumpers