Datasheet

8 / 65 W5500 Datasheet Version1.0 (August 2013)
Table 2. W5500 Pin Description
Pin No
Symbol
Internal
Bias
1
Type
Description
1
TXN
-
AO
TXP/TXN Signal Pair
The differential data is transmitted to the media on the
TXP/TXN signal pair.
2
TXP
-
AO
3
AGND
-
GND
Analog ground
4
AVDD
-
PWR
Analog 3.3V power
5
RXN
-
AI
RXP/RXN Signal Pair
The differential data from the media is received on the
RXP/RXN signal pair.
6
RXP
-
AI
7
DNC
-
AI/O
Do Not Connect Pin
8
AVDD
-
PWR
Analog 3.3V power
9
AGND
-
GND
Analog ground
10
EXRES1
-
AI/O
External Reference Resistor
It should be connected to an external resistor (12.4KΩ,
1%) needed for biasing of internal analog circuits.
Refer to the „External reference resistor‟ (Figure.2) for
details.
11
AVDD
-
PWR
Analog 3.3V power
12
-
-
NC
13
-
-
NC
14
AGND
-
GND
Analog ground
15
AVDD
-
PWR
Analog 3.3V power
16
AGND
-
GND
Analog ground
17
AVDD
-
PWR
Analog 3.3V power
18
VBG
-
AO
Band Gap Output Voltage
This pin will be measured as 1.2V at 25℃.
It must be left floating.
19
AGND
-
GND
Analog ground
20
TOCAP
-
AO
External Reference Capacitor
This pin must be connected to a 4.7uF capacitor.
The trace length to capacitor should be short to
stabilize the internal signals.
21
AVDD
-
PWR
Analog 3.3V power
22
1V2O
-
AO
1.2V Regulator output voltage
1
Internal Bias after hardware reset