xr16m670 Exar Corporation, xr16m670 Datasheet

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xr16m670

Manufacturer Part Number
xr16m670
Description
1.62v To 3.63v High Performance Uart With 32-byte Fifo
Manufacturer
Exar Corporation
Datasheet

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SEPTEMBER 2008
GENERAL DESCRIPTION
The XR16M670
Asynchronous Receiver and Transmitter (UART) with
32 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
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
M670 can be minimized by enabling the sleep mode
and PowerSave mode.
The M670 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 M670 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.
N
Exar
F
OTE
IGURE
:
Corporation 48720 Kato Road, Fremont CA, 94538
1 Covered by U.S. Patent #5,649,122.
1. XR16M670 B
mode
P w rS ave
A 2:A 0
D 7:D 0
R ES E T
IO W #
IO R #
C S#
1
IN T
(M670) is an enhanced Universal
with
LOCK
Auto
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO
D
D ata B us
Interface
IAGRAM
Intel
Address
detection
(510) 668-7000
U AR T
R egs
B R G
C rystal O sc/Buffer
FEATURES
APPLICATIONS
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
Personal Digital Assistants (PDA)
Cellular Phones/Data Devices
Battery-Operated Devices
Global Positioning System (GPS)
Bluetooth
32 B yte R X FIFO
32 B yte TX FIFO
TX &
R X
U A R T
E N D EC
FAX (510) 668-7017
IR
(1.62 to 3.63 V )
XR16M670
X TA L1
X TA L2
TX, R X ,
R I#, C D #
R TS #, C TS #,
D TR #, D S R #,
V C C
G N D
www.exar.com
REV. 1.0.0

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