XR22804 Datasheet, PDF (9/47 Pages) Exar Corporation – Hi-Speed USB to 10/100 Ethernet Bridge with 4 UARTs

Functional Block Diagram
5.0V VCC
5.0V VCC
GND
GND
XTALIN
XTALOUT
25 MHz
Xtal
USBD+
USBD-
VBUS_SENSE
LOW_PWR#
USB
2.0
Phy
USB 2.0
Hub
USB
Descriptors
OTP
10/100
Ethernet
MAC
10/100
Ethernet
PHY
UART
Channel A
UART
Channel B
UART
Channel C
Pin
Mux
UART
Channel D
EDGE
Controller
I2C Master
XR22804
ETH_LINK
ETH_SPD
ETH_TX+
ETH_TX-
ETH_RX+
ETH_RX-
E31/TXD
E3 0/R XD /R W KD #
E29/RTSD#/RS485D/GD5
E28/CTSD#/GD4
E27/DTRD#/GD3
E26/DSRD#/GD2
E25/CDD#/GD1
E2 4/R ID # /R W KD# /G D 0
E23/TXC
E2 2/R XC /R W KC #
E21/RTSC#/RS485C/GC5
E20/CTSC#/GC4
E19/DTRC#/GC3
E18/DSRC#/GC2
E17/CDC#/GC1
E1 6/R IC # /R W KC# /G C 0
E15/TXB
E1 4/R X B /R W KB #
E13/RTSB#/RS485B/GB5
E12/CTSB#/GB4
E11/DTRB#/GB3
E10/DSRB#/GB2
E9/CDB#/GB1
E8 /R IB# /R W KB# /G B 0
E7/TXA
E 6/R XA /R W K A#
E5/RTSA#/RS485A/GA5
E4/CTSA#/GA4
E3/DTRA#/GA3
E2/DSRA#/GA2
E1/CDA#/GA1
E 0/R IA #/R W KA #/G A0
SDA
SCL
© 2015 Exar Corporation
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exar.com/XR22804
Rev 1B