XR18W750 Datasheet, PDF (1/44 Pages) Exar Corporation – WIRELESS UART CONTROLLER

XR18W750
WIRELESS UART CONTROLLER
MARCH 2008
REV. 1.0.0
GENERAL DESCRIPTION
The XR18W750 is a Wireless UART Controller with a
two-wire I²C interface to the XR18W753 RF
transceiver to complete Exar’s Wireless UART
chipset solution. The XR18W750 supports both the
parallel and serial interfaces to any host system thus
providing flexibility for system designers to select
their interface option.
The XR18W750 includes an embedded 8051
microprocessor which provides the power to process
the protocol framing for data transmission and to
handle error processing. Internally, the XR18W750
has a 32KB system memory for loading the firmware
from an external EEPROM and for data processing.
The XR18W750 also includes a 128-bit AES engine
for data encoding and decoding.
The XR18W750 is available in a 48-pin QFN
package.
APPLICATIONS
• Industrial Automation
• Factory Automation
• Point of Sales Systems
• Industrial Servers
• Data Collection Terminals
FEATURES
• 2.25 to 3.63 Volt Operation
• 5 Volt Tolerant Inputs
• 8051 Microcontroller
• 32KB System Memory
• 128-bit AES Engine
• I²C Bus Master Interface to RF Transceivers
• Optional UART interface to RF Transceiver
• Selectable Serial or Parallel Mode Interface
• Enhanced UART
■ 16550 Compatible Register Set
■ Parallel mode data rate from 1200 bps to 230.4
Kbps
■ Serial mode data rate from 1200 bps to
921.6Kbps
■ Transmit and Receive FIFOs of 64 bytes
■ Programmable TX and RX FIFO Trigger Levels
■ Transmit and Receive FIFO Level Counters
■ Automatic Hardware (RTS/CTS) Flow Control
■ Selectable Auto RTS Flow Control Hysteresis
■ Full modem interface
• Device Identification and Revision
• 48-pin QFN package
FIGURE 1. XR18W750 BLOCK DIAGRAM
A2:A0
D7:D0
16/68#, CS#, IOW#, IOR#
INT, TXRDY#, RXRDY#
Parallel
Mode
Serial
TX, RX, RTS#, CTS#, ^Mode
DTR#, DSR#, CD#, RI#
UART
AES
Encoding/
Decoding
32KB
System
Memory
8051
Microprocessor
I²C Interface
GPIO[3:0]
CLK+
CLK-
SDA
SCL
MODEM_RESET
RF_IRQ#
S/P#
RESET
RF_DI
RF_DO
EN_DIDO
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com