User's Manual l STK-MBa53 UM 100 l © 2013 TQ-Group
Page 22
The operation mode of the LAN8720A is preconfigured with MODE[2:0] = 111 (all capable).
Other configurations can be set by placement options:
Table 25:
LAN8720A modes
MODE [0..2]
Function
Remark
000
10BASE-T
Half-duplex, autonegotiation off
001
10BASE-T
Full-duplex, autonegotiation off
010
10BASE-TX
Half-duplex, autonegotiation off
011
100BASE-TX
Full-duplex, autonegotiation off
100
100BASE-TX
Half-duplex start, autonegotiation on
101
100BASE-TX
Repeater Mode, Half-duplex start, autonegotiation on
110
Power down
Information in the data sheet
111
111
111
111
ALL capable
ALL capable
ALL capable
ALL capable
No definitions
No definitions
No definitions
No definitions, autonegotiation on,
, autonegotiation on,
, autonegotiation on,
, autonegotiation on, preset m
preset m
preset m
preset mode in
ode in
ode in
ode in hardware
hardware
hardware
hardware
The RJ45 receptacle X11 provides 2 status LEDs, as well as an integrated magnetics.
Illustration 16: Position of Ethernet connector X11
Table 26:
Ethernet connector X11
Manufacturer / number
Description
Pulse / J0011D21BNL
•
RJ45 receptacle
•
Integrated magnetics
•
1.5 kV RMS (min.)
•
LEDs: green and yellow
•
0 °C to +70 °C
•
750 mating cycles
Table 27:
Pin assignment RJ45 receptacle X11 (Ethernet 1)
Pin
Pin name
Signal
Dir.
Remark
1
TX+
ETH1_TXP
O
–
2
TX–
ETH1_TXN
O
–
3
RX+
ETH1_RXP
I
–
4
–
VCC3V3A_ETH1
–
–
5
–
–
–
–
6
RX–
ETH1_RXN
I
–
7
n.c.
–
–
(Not used)
8
–
DGND
P
–
M1..2
–
DGND
P
–
A1 (12)
LED1 anode (+)
VCC3V3A_ETH1
–
Link Activity, green (shines with available
connection, blinks with transfer)
K1 (11)
LED1 cathode (–)
INTSEL# (270 Ω )
–
A2 (9)
LED2 anode (+)
REGOFF
–
Speed Indicator, yellow (shines with
100 Mbit/s, does not shine with 10 Mbit/s)
K2 (10)
LED2 cathode (–)
DGND (270 Ω )
–
# - low active signal, - element to VCC5V (pull-up), - element to ground (pull-down), - element in series
