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Exar Corporation

XR16C872 Datasheet Preview

XR16C872 Datasheet

DUAL UART

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DISCONTINUED
XR16C872
DUAL UART WITH 1284 PARALLEL PORT
AND PLUG-AND-PLAY CONTROLLER
DESCRIPTION
August 2003
The XR16C8721 (872) is a dual universal asynchronous receiver and transmitter (UART) with a 1284 bi-directional
parallel port and ISA Bus Plug-and-Play (PnP) interface. The PnP interface supports auto configuration for desktop
and embedded PC computers. The host bus interface can also be configured to manually support standard PC
addresses COM1-4 and LPT1-2. The parallel port is compatible to IEEE 1284 specification and supports Compatible
Centronics, Extended Capability (ECP) and Enhanced Parallel Port (EPP) protocols. The UARTs are software
compatible to industry standard 16C550 and include enhanced features of 128 bytes of transmit and receive FIFOs,
programmable transmit and receive FIFO trigger levels, transmit and receive FIFO counters, IrDA (Infrared Data
Association) encoder/decoder, automatic RTS/CTS hardware flow control with selectable hysteresis and automatic
software (Xon/Xoff) flow control. On board status registers provide interrupt priorities, receive data errors and modem
status. Each channel has a programmable baud rate generator to provide data rates up to 460.8Kbps. The bi-
directional parallel port can be configured as a general purpose input/output interface or connected to a printer or
portable storage devices. The 872 operates on a single +5V and +3.3 power supply. It is available in a small 100-
pin QFP package and offers commercial and industrial temperature ranges. The chip is fabricated in an advanced
CMOS process to reduce power consumption.
FEATURES
Plug and Play ISA Bus Specification Compliant
- Auto Configuration
- Direct Connection, Needing no External Buffers
- Resource Data in External 4K EEPROM
- Support 10-Interrupts, IRQ3-7, IRQ9-12, IRQ15
Manual Configuration for standard COM1-COM-4
and LPT1-LPT2
IEEE 1284 Compliant
www.DataShee-t4BUid.cioremctional Host Port
- Level II Electrical Interface, Needing no
External Transceivers
- Standard Centronics/ECP/EPP Mode
- 16-byte FIFO in ECP mode
APPLICATIONS
Multi-function PC/ISA Bus Card with RS-232/
RS-422/RS-485 Interface and Printer/parallel Port
Embedded Systems
Dual UART Software Compatible with 16C550
128-byte of Transmit and Receive FIFOs to
Reduce CPU Bandwidth Requirement
FIFO Counters in Transmitter and Receiver
Automatic RTS/CTS Flow Control with Hysteresis
to Increase Data Throughput
IrDA Infrared Pulse Shaping Encoder/decoder
for up to 115.2Kbps Data Rate
Up to 460.8 Kbps Standard Serial Data Rate
+5V and +3.3V Operation
100-pin Quad Flat Package (14x20mm)
Reference PC ISA Card Design Available
Windows2 95, 98 and NT4 Drivers Available
Portable Infrared Wireless Systems
High Speed Bidirectional Parallel Port
High Speed Serial Ports
ORDERING INFORMATION
Part number
XR16C872CQ
XR16C872IQ
Package
100-Lead QFP
100-Lead QFP
Operating temperature
0° C to + 70° C
-40° C to + 85° C
Device Status
Discontinued. No replacement available.
Discontinued. No replacement available.
1Covered by U.S. patent number 5,649,122 and patent pending.
2Windows is a trademark of Microsoft Corp.
Rev. 1.00
Visit Exar Web Site at www.exar.com
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017




Exar Corporation

XR16C872 Datasheet Preview

XR16C872 Datasheet

DUAL UART

No Preview Available !

XR16C872
DISCONTINUED
DREQ0 81
DACK5# 82
DACK3# 83
DACK1# 84
DACK0# 85
IRQ15 86
IRQ12
IRQ11
87
88
IRQ10
VCC
89
90
TC 91
IRQ3
92
IRQ4
93
IRQ5
94
IRQ6
95
IRQ7
96
IRQ9
97
GND
IOR#
98
99
IOW#
100
www.DataSheet4U.com
XR16C872
50 BUSY
49 PE
48 SELECT
47 STROBE#
46 AUTOFD#
45 INIT#
44 SELCTIN#
43 GND
42 VCC
41 PD0
40 PD1
39 PD2
38 PD3
37 PD4
36 GND
35 VCC
34 PD5
33 PD6
32 PD7
31 PDIR
100 Pin PQFP (14X20x3 mm, 1.95 mm form)
Figure 1, Package Description (Top View)
Rev. 1.00
Visit Exar Web Site at www.exar.com
2


Part Number XR16C872
Description DUAL UART
Maker Exar Corporation
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