9
DP83640 DEMO BOARD USER GUIDE
2.8
Table of Jumpers
Table 6. List of Jumpers
Jumper Name
Function
Default
Setting
Power
J11/J12
Selects device 3.3 V source (Default MII_3V3)
J55
MII 5V/3V3
Bypasses 3.3 V regulator for 3.3 V MII supply
Open
MDIO/MDC Access
J3
MDC_SEL
Allows selection between USB, MII or parallel port
MDC source
Jumper to
PMDC_MII
J4
MDIO_SEL
Allows selection between USB, MII or parallel port
MDIO source
Jumper to
PMDIO_MII
J22
GND
Ground for parallel port source
Open
Address
J24
PHYAD0
PHY address strap pin
Open
J26
PHYAD1
PHY address strap pin
Open
Auto-Negotiation
J33
ACT
Force/Advertised operation mode in auto-
negotiation
Pulled High
J36
SPEED
Force/Advertised operation mode in auto-
negotiation
Pulled High
J39
LINK
Enable/Disable auto-negotiation
Pulled High
Reset
J8
RESET_N
Allows reset of DP83640
Open
J40
/RESET
Allows reset of USB interface device
Open
Function
J5
PWRDOWN/INTN Allows for powerdown and interrupt modes
Open
J23
MII_MODE
Allows for MII_MODE strap option. Placing the
jumper forces the unit into RMII mode.
Open
J25
LED_CFG
Allows for LED configuration strap option
Open
J29
RMII_MAS
Allows for RMII_MAS strap option. Placing the
jumper forces the unit into RMII Master mode when
MII_MODE (J23) is strapped.
Open
J32
GPIO1
Allows GPIO1 LED connection and CLK_OUT_EN
strap option
Open
J35
GPIO2
Allows GPIO2 LED connection and PCF_EN strap
option
Open
J38
GPIO3
Allows GPIO3 LED connection
Open
J41
GPIO4
Allows GPIO4 LED connection
Open
J42
GPIO8
Allows GPIO8 LED connection
Open
J64
ALP EEPROM write control (Internal Use)
Open
