XR22802 Datasheet, PDF (6/46 Pages) Exar Corporation – Hi-Speed USB to 10/100 Ethernet Bridge

Pin No.
Pin Name
8
GND
9
USBD–
10
USBD+
11
VCC
12
E26
13
ETH_SPD
14
E27
15
XTALOUT
16
XTALIN
17
E24
18
E25
19
3V3_OUT
20
GND
21
ETH_TX–
22
ETH_TX+
23
ETH_RX+
24
ETH_RX–
25
E22
26
E23
27
E21
28
E20
29
E0/RIA#/RWKA#/GA0
30
E1/CDA#/GA1
31
E17
32
E16
33
ETH_LINK
34
E19
35
CAP2
36
GND
37
E18
38
E8/RIB#/RWKB#/GB0
39
E9/CDB#/GB1
© 2015 Exar Corporation
XR22802
Type
PWR
I/O
I/O
PWR
I/O
O
I/O
O
I
I/O
I/O
PWR
PWR
O
O
I
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
I/O
I
PWR
I/O
I/O
I/O
Description
Power supply common, ground
USB port differential data negative
USB port differential data positive
5.0V power supply input
Enhanced general purpose IO
Ethernet 100 Mbps Speed Indicator. Asserted high for 100 Mbps.
Enhanced general purpose IO
Crystal or buffered clock output
25 MHz +/- 50 ppm Crystal or external clock input
Enhanced general purpose IO
Enhanced general purpose IO
3.3 V output power. Connect externally to CAP1 and CAP2 using short trace and decouple
with minimum of 4.7uF capacitor
Power supply common, ground
Ethernet transmit data out negative
Ethernet transmit data out positive
Ethernet receive data in positive
Ethernet receive data in negative
Enhanced general purpose IO
Enhanced general purpose IO
Enhanced general purpose IO
Enhanced general purpose IO
Enhanced general purpose IO, or UART channel A Ring Indicator, or remote wakeup, or gen-
eral purpose IO. Defaults to UART GPIO input. Refer to Remote Wakeup section on page 10.
Enhanced general purpose IO, or UART channel A Carrier Detect, or general purpose IO.
Defaults to UART GPIO input.
Enhanced general purpose IO, or UART channel C Carrier Detect, or general purpose IO.
Defaults to UART GPIO input.
Enhanced general purpose IO
Ethernet 10/100 Activity Indicator. Toggles with activity
Enhanced general purpose IO
Connect externally to CAP1 and 3V3_OUT using short trace
Power supply common, ground
Enhanced general purpose IO
Enhanced general purpose IO, or UART channel B Ring Indicator, or remote wakeup, or gen-
eral purpose IO. Defaults to UART GPIO input. Refer to Remote Wakeup section on page 10.
Enhanced general purpose IO, or UART channel B Carrier Detect, or general purpose IO.
Defaults to UART GPIO input.
6 / 46
exar.com/XR22802
Rev 1B