SMSC EVB8700 Скачать руководство пользователя страница 5

LAN8700 Evaluation Board User Manual

SMSC LAN8700

USER MANUAL

Revision 1.0 (02-23-10)

5

 

2.2.2

Boot Mode Configuration

The LAN8700 can be configured to boot into a specific mode of operation at power-up via the
MODE[2:0] configuration straps. By default, the MODE[2:0] configuration straps are pulled-up internally
to “1”. Unpopulated pull-down resistor pads are provided for each MODE[2:0] configuration strap.
These pull-down resistors should only be populated when the corresponding MODE[2:0] configuration
strap is desired to default to “0”. A list of the LAN8700 modes and their corresponding pull-down
resistor configurations are shown in 

Table 2.3

.

Note 2.1

Refer to the LAN8700 Datasheet for additional information on Repeater mode.

Note 2.2

Refer to the LAN8700 Datasheet for additional information on Power-Down mode.

Table 2.3  MODE[2:0] Resistor Configuration 

MODE[2:0]

MODE DEFINITIONS

MODE[2:0] PULL-DOWN RESISTORS

R40

(MODE2)

R41

(MODE1)

R42

(MODE0)

000

10BASE-T Half Duplex

Auto-negotiation disabled

Populated

Populated

Populated

001

10BASE-T Full Duplex 

Auto-negotiation disabled.

Populated

Populated

Unpopulated

010

100BASE-TX Half Duplex 

Auto-negotiation disabled

CRS is active during Transmit & Receive

Populated

Unpopulated

Populated

011

100BASE-TX Full Duplex 

Auto-negotiation disabled

CRS is active during Receive

Populated

Unpopulated

Unpopulated

100

100BASE-TX Half Duplex is advertised 

Auto-negotiation enabled.

CRS is active during Transmit & Receive.

Unpopulated

Populated

Populated

101

Repeater mode (

Note 2.1

Auto-negotiation enabled 

100BASE-TX Half Duplex is advertised

CRS is active during receive

Unpopulated

Populated

Unpopulated

110

Power Down mode (

Note 2.2

)

Unpopulated

Unpopulated

Populated

111

All capable. Auto-negotiation enabled (Default)

Unpopulated

Unpopulated

Unpopulated

Содержание EVB8700

Страница 1: ...n request SMSC products are not designed intended authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe...

Страница 2: ...0 pin female MII connector from an existing MAC controller to the SMSC LAN8700 Ethernet PHY and out to an RJ45 Ethernet Jack for 10 100 connectivity A simplified block diagram of the EVB8700 can be se...

Страница 3: ...header J2 Note Before connecting an external power supply to TP2 ensure power is not present on the MII connector s 5V pins Connecting 5V simultaneously via the MII connector and TP2 may result in per...

Страница 4: ...LT PHYAD4 MSB R11 populated R11 unpopulated PHYAD3 R46 unpopulated R48 populated R36 populated LED2 anode connected to FDUPLEX pin flipped R46 populated R48 unpopulated R36 unpopulated LED2 cathode co...

Страница 5: ...on on Power Down mode Table 2 3 MODE 2 0 Resistor Configuration MODE 2 0 MODE DEFINITIONS MODE 2 0 PULL DOWN RESISTORS R40 MODE2 R41 MODE1 R42 MODE0 000 10BASE T Half Duplex Auto negotiation disabled...

Страница 6: ...pulated R52 must be in the 2 3 position which routes TX_ER TXD4 to pin 11 of the J2 MII header For additional information on the functionality of the nINT TX_ER TXD4 pin refer to the LAN8700 Datasheet...

Страница 7: ...he nINTSEL configuration strap value Refer to Section 2 2 3 nINT TX_ER TXD4 Pin Configuration on page 6 for additional information 2 2 6 Switches Table 2 6 J2 2x14 MII Header Pinout HEADER PIN DESCRIP...

Страница 8: ...ard User Manual Revision 1 0 02 23 10 USER MANUAL SMSC LAN8700 8 2 3 Mechanicals Figure 2 2 details the EVB8700 mechanical dimensions Figure 2 2 EVB8700 Mechanicals 1 750 3 530 0 125 0 125 TOP VIEW 0...

Страница 9: ...tion Board User Manual SMSC LAN8700 USER MANUAL Revision 1 0 02 23 10 9 3 User Manual Revision History Table 3 1 Revision History REVISION LEVEL DATE SECTION FIGURE ENTRY CORRECTION Rev 1 0 02 23 10 I...

Страница 10: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Microchip EVB8700...

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