XR16M781IB25 datasheet, PDF - EEWORLD Datasheet

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XR16M781IB25: DescriptionSerial I/O Controller, 1 Channel(s), 2.5MBps, CMOS, PBGA25, 3 X 3 MM, 0.80 MM HEIGHT, BGA-25; CategoryThe embedded processor and controller Microcontrollers and processors; File Size1MB，52 Pages; ManufacturerExar

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XR16M781IB25 Overview

Serial I/O Controller, 1 Channel(s), 2.5MBps, CMOS, PBGA25, 3 X 3 MM, 0.80 MM HEIGHT, BGA-25

XR16M781IB25 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Exar
Parts packaging code	BGA
package instruction	VFBGA, BGA25,5X5,20
Contacts	25
Reach Compliance Code	compliant
Other features	ALSO OPERATES AT 2.5V SUPPLY
Address bus width	8
boundary scan	NO
maximum clock frequency	80 MHz
letter of agreement	ASYNC, BIT
Data encoding/decoding methods	NRZ
Maximum data transfer rate	2.5 MBps
External data bus width	8
JESD-30 code	S-PBGA-B25
JESD-609 code	e0
length	3 mm
low power mode	NO
Number of serial I/Os	1
Number of terminals	25
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	VFBGA
Encapsulate equivalent code	BGA25,5X5,20
Package shape	SQUARE
Package form	GRID ARRAY, VERY THIN PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	1.8/3.3 V
Certification status	Not Qualified
Maximum seat height	0.8 mm
Maximum supply voltage	3.63 V
Minimum supply voltage	2.97 V
Nominal supply voltage	3.3 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	TIN LEAD
Terminal form	BALL
Terminal pitch	0.5 mm
Terminal location	BOTTOM
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3 mm
uPs/uCs/peripheral integrated circuit type	SERIAL IO/COMMUNICATION CONTROLLER, SERIAL

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XR16M781

1.62V TO 3.63V UART WITH 64-BYTE FIFO AND VLIO INTERFACE

AUGUST 2009

REV. 1.0.1

GENERAL DESCRIPTION

The XR16M781

(M781) is an enhanced Universal

Asynchronous Receiver and Transmitter (UART) with

a VLIO bus interface and has 64 bytes of transmit

and receive FIFOs, programmable transmit and

receive FIFO trigger levels, automatic hardware and

software flow control, and data rates of up to 20 Mbps

at 3.3V, 16 Mbps at 2.5V and 10 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

M781 can be minmized by enabling the sleep mode

and PowerSave mode.

The M781 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 M781 is available in 24-pin

QFN, 32-pin QFN and 25-pin BGA packages.

OTE

1 Covered by U.S. Patent #5,649,122.

FEATURES

•

VLIO bus interface

•

Pin-to-pin compatible with SC16C850V and

SC16C850SV in 32-QFN package

•

20 Mbps maximum data rate

•

Programmable 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

•

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

IGURE

1. XR16M781 B

LOCK

IAGRAM

VCC

(1.62 to 3.63 V)

BRG

UART

GND

64 Byte TX FIFO

TX &

ENDEC RX

64 Byte RX FIFO

TX, RX,

RTS#, CTS#,

DTR#, DSR#,

RI#, CD#

Pw rSave

LLA#

AD7:AD0

IOR#

IOW #

CS#

INT

RESET#

VLIO Bus

Interface

Regs

BRG

Crystal Osc/Buffer

XTAL1

XTAL2

Exar

Corporation 48720 Kato Road, Fremont CA, 94538

•

(510) 668-7000

•

FAX (510) 668-7017

•

www.exar.com

XR16M781

REV. 1.0.1

1.62V TO 3.63V UART WITH 64-BYTE FIFO AND VLIO INTERFACE

1.0 PRODUCT DESCRIPTION

The XR16M781 (M781) is a high performance single-channel UART with a VLIO bus interface. It has its set of

device configuration registers. The configuration registers set is 16550 UART compatible for control, status

and data transfer. Additionally, the M781 channel has 64 bytes of transmit and receive FIFOs, Automatic RTS/

CTS Hardware Flow Control, Automatic Xon/Xoff and Special Character Software Flow Control, infrared

encoder and decoder (IrDA ver 1.0 and 1.1), programmable fractional baud rate generator with a prescaler of

divide by 1 or 4, and data rate up to 20 Mbps. The XR16M781 can operate from 1.62 to 3.63 volts. The M781

is fabricated with an advanced CMOS process.

Larger FIFO

The M781 provides a solution that supports 64 bytes of transmit and receive FIFO memory, instead of 16 bytes

in the XR16L580. The M781 is designed to work with high performance data communication systems, that

requires fast data processing time. Increased performance is realized in the M781 by the larger transmit and

receive FIFOs, FIFO trigger level control and automatic flow control mechanism. This allows the external

processor to handle more networking tasks within a given time. For example, the XR16L580 with a 16 byte

FIFO, unloads 16 bytes of receive data in 1.53 ms (This example uses a character length of 11 bits, including

start/stop bits at 115.2Kbps). This means the external CPU will have to service the receive FIFO at 1.53 ms

intervals. However with the 64 byte FIFO in the M781, the data buffer will not require unloading/loading for 6.1

ms. This increases the service interval giving the external CPU additional time for other applications and

reducing the overall UART interrupt servicing time. In addition, the programmable FIFO level trigger interrupt

and automatic hardware/software flow control is uniquely provided for maximum data throughput performance

especially when operating in a multi-channel system. The combination of the above greatly reduces the CPU’s

bandwidth requirement, increases performance, and reduces power consumption.

Data Rate

The M781 is capable of operation up to 20 Mbps at 3.3V with 4X internal sampling clock rate. The device can

operate at 3.3V with a 24 MHz crystal on pins XTAL1 and XTAL2, or external clock source of 80 MHz on XTAL1

pin. With a typical crystal of 14.7456 MHz and through a software option, the user can set the prescaler bit and

sampling rate for data rates of up to 3.68 Mbps.

Enhanced Features

The rich feature set of the M781 is available through the internal registers. Automatic hardware/software flow

control, programmable transmit and receive FIFO trigger levels, selectable baud rates, infrared encoder/

decoder, modem interface controls, and a sleep mode are all standard features. MCR bit-5 provides a facility

for turning off (Xon) software flow control with any incoming (RX) character. The M781 includes new features

such as 9-bit (Multidrop) mode, auto RS-485 half-duplex direction control, different baud rate for TX and RX,

fast IR mode and fractional baud rate generator.

XR16M781IB25 Related Products

	XR16M781IB25	XR16M781IL24	XR16M781IL32
Description	Serial I/O Controller, 1 Channel(s), 2.5MBps, CMOS, PBGA25, 3 X 3 MM, 0.80 MM HEIGHT, BGA-25	Serial I/O Controller, 1 Channel(s), 2.5MBps, CMOS, 4 X 4 MM, 0.90 MM HEIGHT, QFN-24	Serial I/O Controller, 1 Channel(s), 2.5MBps, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, QFN-32
Is it lead-free?	Contains lead	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible	incompatible
Maker	Exar	Exar	Exar
Parts packaging code	BGA	QFN	QFN
package instruction	VFBGA, BGA25,5X5,20	HVQCCN, LCC24,.16SQ,20	HVQCCN, LCC32,.2SQ,20
Contacts	25	24	32
Reach Compliance Code	compliant	compli	compli
Other features	ALSO OPERATES AT 2.5V SUPPLY	ALSO OPERATES AT 2.5V SUPPLY	ALSO OPERATES AT 2.5V SUPPLY
Address bus width	8	8	8
boundary scan	NO	NO	NO
maximum clock frequency	80 MHz	80 MHz	80 MHz
letter of agreement	ASYNC, BIT	ASYNC, BIT	ASYNC, BIT
Data encoding/decoding methods	NRZ	NRZ	NRZ
Maximum data transfer rate	2.5 MBps	2.5 MBps	2.5 MBps
External data bus width	8	8	8
JESD-30 code	S-PBGA-B25	S-XQCC-N24	S-XQCC-N32
JESD-609 code	e0	e0	e0
length	3 mm	4 mm	5 mm
low power mode	NO	NO	NO
Number of serial I/Os	1	1	1
Number of terminals	25	24	32
Maximum operating temperature	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	UNSPECIFIED	UNSPECIFIED
encapsulated code	VFBGA	HVQCCN	HVQCCN
Encapsulate equivalent code	BGA25,5X5,20	LCC24,.16SQ,20	LCC32,.2SQ,20
Package shape	SQUARE	SQUARE	SQUARE
Package form	GRID ARRAY, VERY THIN PROFILE, FINE PITCH	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	240	240
power supply	1.8/3.3 V	1.8/3.3 V	1.8/3.3 V
Certification status	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	0.8 mm	1 mm	1 mm
Maximum supply voltage	3.63 V	3.63 V	3.63 V
Minimum supply voltage	2.97 V	2.97 V	2.97 V
Nominal supply voltage	3.3 V	3.3 V	3.3 V
surface mount	YES	YES	YES
technology	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	TIN LEAD	TIN LEAD	TIN LEAD
Terminal form	BALL	NO LEAD	NO LEAD
Terminal pitch	0.5 mm	0.5 mm	0.5 mm
Terminal location	BOTTOM	QUAD	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
width	3 mm	4 mm	5 mm
uPs/uCs/peripheral integrated circuit type	SERIAL IO/COMMUNICATION CONTROLLER, SERIAL	SERIAL IO/COMMUNICATION CONTROLLER, SERIAL	SERIAL IO/COMMUNICATION CONTROLLER, SERIAL
Humidity sensitivity level	-	1	1

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