XR16M570 Datasheet, PDF (1/52 Pages) Exar Corporation – 1.62V TO 3.63V HIGH PERFORMANCE UART WITH 16-BYTE FIFO

XR16M570
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 16-BYTE FIFO
SEPTEMBER 2008
REV. 1.0.0
GENERAL DESCRIPTION
The XR16M570¹ (M570) is an enhanced Universal
Asynchronous Receiver and Transmitter (UART) with
16 bytes of transmit and receive FIFOs, selectable
transmit and receive FIFO trigger levels, automatic
hardware and software flow control, and data rates of
up to 16 Mbps at 3.3V, 12.5 Mbps at 2.5V and 7.5
Mbps at 1.8V with 4X data sampling rate.
The Auto RS-485 Half-Duplex Direction control
feature simplifies both the hardware and software for
half-duplex RS-485 applications. In addition, the
Multidrop mode with Auto Address detection
increases the performance by simplifying the
software routines.
The Independent TX/RX Baud Rate Generator
feature allows the transmitter and receiver to operate
at different baud rates. Power consumption of the
M570 can be minimized by enabling the sleep mode
and PowerSave mode.
The M570 has a 16550 compatible register set that
provide users with operating status and control,
receiver error indications, and modem serial interface
controls. An internal loopback capability allows
onboard diagnostics. The M570 is available in 24-pin
QFN, 32-pin QFN and 25-pin BGA packages. All
three packages offer the 16 mode (Intel bus) interface
only.
NOTE: 1 Covered by U.S. Patent #5,649,122.
FEATURES
• Pin-to-pin compatible with XR16L570 in 24-QFN
and 32-QFN packages
• Intel data bus Interface
• 16 Mbps maximum data rate
• Selectable TX/RX FIFO Trigger Levels
• TX/RX FIFO Level Counters
• Independent TX/RX Baud Rate Generator
• Fractional Baud Rate Generator
• Auto RTS/CTS Hardware Flow Control
• Auto XON/XOFF Software Flow Control
• Auto RS-485 Half-Duplex Direction Control
• Multidrop mode w/ Auto Address Detect
• Sleep Mode with Automatic Wake-up
• PowerSave mode in 24-pin QFN package
• Infrared (IrDA 1.0 and 1.1) mode
• 1.62V to 3.63V supply operation
• Crystal oscillator or external clock input
APPLICATIONS
• Personal Digital Assistants (PDA)
• Cellular Phones/Data Devices
• Battery-Operated Devices
• Global Positioning System (GPS)
• Bluetooth
FIGURE 1. XR16M570 BLOCK DIAGRAM
PwrSave
A2:A0
D 7 :D 0
IO R #
IOW #
CS#
IN T
RESET
Intel
Data Bus
Interface
UART
UART ^{16 Byte TX FIFO}
Regs _{TX &}
RX
IR
ENDEC
BRG 16 Byte RX FIFO
Crystal Osc/Buffer
VCC
(1.62 to 3.63 V)
GND
TX, RX,
RTS#, CTS#,
DTR#, DSR#,
RI#, CD#
XTAL1
XTAL2
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • [phone] • FAX [phone] • www.exar.com