XR20M1170IL28-F datasheet, PDF

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XR20M1170IL28-F: DescriptionI2C Bus Controller, 8 Channel(s), 2MBps, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, GREEN, QFN-28; CategoryThe embedded processor and controller Microcontrollers and processors; File Size491KB，56 Pages; ManufacturerExar; Environmental Compliance

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I2C Bus Controller, 8 Channel(s), 2MBps, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, GREEN, QFN-28

XR20M1170IL28-F Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Parts packaging code	QFN
package instruction	VQCCN, LCC28,.2SQ,20
Contacts	28
Reach Compliance Code	unknown
Address bus width
boundary scan	NO
maximum clock frequency	24 MHz
letter of agreement	I2C
Maximum data transfer rate	2 MBps
External data bus width
JESD-30 code	S-XQCC-N28
JESD-609 code	e3
length	5 mm
low power mode	NO
Number of serial I/Os	8
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	VQCCN
Encapsulate equivalent code	LCC28,.2SQ,20
Package shape	SQUARE
Package form	CHIP CARRIER, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	260
power supply	1.8/3.3 V
Certification status	Not Qualified
Maximum seat height	1 mm
Maximum supply voltage	3.63 V
Minimum supply voltage	1.62 V
Nominal supply voltage	3.3 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	40
width	5 mm
uPs/uCs/peripheral integrated circuit type	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS
Base Number Matches	1

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XR20M1170

I2C/SPI UART WITH 64-BYTE FIFO

JULY 2012

REV. 1.1.0

GENERAL DESCRIPTION

The XR20M1170

(M1170) is a high performance

universal asynchronous receiver and transmitter

(UART) with 64 byte TX and RX FIFOs and a

selectable I

C/SPI slave interface. The M1170

operates from 1.62 to 3.63 volts. The enhanced

features in the M1170 include a programmable

fractional baud rate generator, an 8X and 4X

sampling rate that allows for a maximum baud rate of

16 Mbps at 3.3V. The standard features include 16

selectable TX and RX FIFO trigger levels, automatic

hardware (RTS/CTS) and software (Xon/Xoff) flow

control, and a complete modem interface. Onboard

registers provide the user with operational status and

data error flags. An internal loopback capability

allows system diagnostics. The M1170 is available in

the 24-pin QFN, 16-pin QFN, 24-pin TSSOP and 16-

pin TSSOP packages.

OTE

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

FEATURES

•

1.62 to 3.6 Volt Operation

•

Selectable I

C/SPI Interface

•

SPI clock frequency up to

■

18 MHz at 3.3 V

16 MHz at 2.5 V

8 MHz at 1.8 V

Data rate of up to

16 Mbps at 3.3 V

Data rate of up to

12.5 Mbps at 2.5 V

Data rate of up to

8 Mbps at 1.8 V

Fractional Baud Rate Generator

Transmit and Receive FIFOs of 64 bytes

16 Selectable TX and RX FIFO Trigger Levels

Automatic Hardware (RTS/CTS) Flow Control

Automatic Software (Xon/Xoff) Flow Control

Halt and Resume Transmission Control

Automatic RS-485 Half-duplex

Control Output via RTS#

Direction

•

Full-featured UART

■

APPLICATIONS

•

Portable Appliances

•

Battery-Operated Devices

•

Cellular Data Devices

•

Factory Automation and Process Controls

■

Wireless Infrared (IrDA 1.0 and 1.1) Encoder/

Decoder

Automatic sleep mode (< 15 uA at 3.3V)

General Purpose I/Os

Full modem interface

■

•

Crystal oscillator (up to 24MHz) or external clock

(up to 64MHz) input

•

24-QFN,

packages

IGURE

1. XR20M1170 B

LOCK

IAGRAM

16-QFN,

24-TSSOP,

16-TSSOP

VCC

1.62V – 3.63V

64 Byte

TX FIFO

UART

Regs

64 Byte

RX FIFO

RTS#

CTS#

IRQ#

SDA

SCL

A0/CS#

A1/SI

I2C/SPI#

C/SPI

Interface

GPIOs

BRG

Crystal Osc/Buffer

GPIO[7:0]

XTAL1

XTAL2

Exar

Corporation 48720 Kato Road, Fremont CA, 94538

•

(510) 668-7000

•

FAX (510) 668-7017

•

www.exar.com

XR20M1170

REV. 1.1.0

I2C/SPI UART WITH 64-BYTE FIFO

1.0 PRODUCT DESCRIPTION

The XR20M1170 (M1170) integrates a selectable I

C/SPI bus interface with an enhanced Universal

Asynchronous Receiver and Transmitter (UART). The configuration registers set is 16550 UART compatible

for control, status and data transfer. Additionally, the M1170 has 64-bytes of transmit and receive FIFOs,

automatic RTS/CTS hardware flow control, automatic Xon/Xoff and special character software flow control,

programmable transmit and receive FIFO trigger levels, infrared encoder and decoder (IrDA 1.0 and 1.1),

programmable fractional baud rate generator with a prescaler of divide by 1 or 4, and data rate up to 16 Mbps

with 4X sampling clock rate. The XR20M1170 is a 1.62V to 3.63V device. The M1170 is fabricated with an

advanced CMOS process.

Enhanced Features

The M1170 UART provides a solution that supports 64 bytes of transmit and receive FIFO memory, instead of

16 bytes in the industry standard 16C550. The M1170 is designed to work with low supply voltage and high

performance data communication systems, that require fast data processing time. Increased performance is

realized in the M1170 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 16C550 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 115.2 Kbps). 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 M1170, 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.

The M1170 supports a half-duplex output direction control signaling pin, RTS#, to enable and disable the

external RS-485 transceiver operation. It automatically switches the logic state of the output pin to the receive

state after the last stop-bit of the last character has been shifted out of the transmitter. After receiving, the logic

state of the output pin switches back to the transmit state when a data byte is loaded in the transmitter. The

auto RS-485 direction control pin is not activated after reset. To activate the direction control function, user has

to set EFCR bit-4 to “1”. This pin is HIGH for receive state and LOW for transmit state. The polarity of the

RTS# pin can be inverted via EFCR bit-5.

Data Rate

The M1170 is capable of operation up to 16 Mbps at 3.3V with 4X internal sampling clock rate, 8 Mbps at 3.3V

with 8X sampling clock rate, and 4 Mbps at 3.3V with 16X internal sampling clock rate. The device can operate

with an external 24 MHz crystal on pins XTAL1 and XTAL2, or external clock source of up to 64 MHz on XTAL1

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

data rates of up to 3.68 Mbps.

The rich feature set of the M1170 is available through the internal registers. Automatic hardware/software flow

control, programmable transmit and receive FIFO trigger levels, programmable TX and RX baud rates, infrared

encoder/decoder interface, modem interface controls, and a sleep mode are all standard features.

Following a power on reset or an external reset, the M1170 is software compatible with previous generation of

UARTs, 16C450, 16C550 and 16C2550.

XR20M1170IL28-F Related Products

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Description	I2C Bus Controller, 8 Channel(s), 2MBps, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, 0.50 MM PITCH, GREEN, QFN-28	I2C Bus Controller, 8 Channel(s), 2MBps, CMOS, 4 X 4 MM, 0.90 MM HEIGHT, 0.65 MM PITCH, GREEN, QFN-16	I2C Bus Controller, 8 Channel(s), 2MBps, CMOS, PDSO24, 4.40 MM, GREEN, TSSOP-24	I2C Bus Controller, 8 Channel(s), 2MBps, CMOS, PDSO16, 4.40 MM, TSSOP-16	I2C Bus Controller, 8 Channel(s), 2MBps, CMOS, PDSO24, 4.40 MM, TSSOP-24	I2C Bus Controller, CMOS, PDSO24,
Is it Rohs certified?	conform to	conform to	conform to	incompatible	incompatible	conform to
package instruction	VQCCN, LCC28,.2SQ,20	VQCCN, LCC16,.16SQ,25	TSSOP, TSSOP24,.25	TSSOP, TSSOP16,.25	TSSOP, TSSOP24,.25	TSSOP, TSSOP24,.25
Reach Compliance Code	unknown	compliant	compliant	unknow	unknow	compli
JESD-30 code	S-XQCC-N28	S-XQCC-N16	R-PDSO-G24	R-PDSO-G16	R-PDSO-G24	R-PDSO-G24
Number of terminals	28	16	24	16	24	24
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	UNSPECIFIED	UNSPECIFIED	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	VQCCN	VQCCN	TSSOP	TSSOP	TSSOP	TSSOP
Encapsulate equivalent code	LCC28,.2SQ,20	LCC16,.16SQ,25	TSSOP24,.25	TSSOP16,.25	TSSOP24,.25	TSSOP24,.25
Package shape	SQUARE	SQUARE	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	CHIP CARRIER, VERY THIN PROFILE	CHIP CARRIER, VERY THIN PROFILE	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	260	260	260	225	225	260
power supply	1.8/3.3 V	1.8/3.3 V	1.8/3.3 V	1.8/3.3 V	1.8/3.3 V	1.8/3.3 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
surface mount	YES	YES	YES	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	NO LEAD	NO LEAD	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	0.5 mm	0.65 mm	0.65 mm	0.65 mm	0.65 mm	0.635 mm
Terminal location	QUAD	QUAD	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	40	40	40	NOT SPECIFIED	NOT SPECIFIED	40
uPs/uCs/peripheral integrated circuit type	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS	SERIAL IO/COMMUNICATION CONTROLLER, I2C BUS
Parts packaging code	QFN	QFN	TSSOP	TSSOP	TSSOP	-
Contacts	28	16	24	16	24	-
boundary scan	NO	NO	NO	NO	NO	-
maximum clock frequency	24 MHz	24 MHz	24 MHz	24 MHz	24 MHz	-
letter of agreement	I2C	I2C	I2C	I2C	I2C	-
Maximum data transfer rate	2 MBps	2 MBps	2 MBps	2 MBps	2 MBps	-
JESD-609 code	e3	e3	e3	-	-	e3
length	5 mm	4 mm	7.8 mm	5 mm	7.8 mm	-
low power mode	NO	NO	NO	NO	NO	-
Number of serial I/Os	8	8	8	8	8	-
Maximum seat height	1 mm	1 mm	1.2 mm	1.2 mm	1.2 mm	-
Maximum supply voltage	3.63 V	3.63 V	3.63 V	3.63 V	3.63 V	-
Minimum supply voltage	1.62 V	1.62 V	1.62 V	1.62 V	1.62 V	-
Nominal supply voltage	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V	-
Terminal surface	Matte Tin (Sn)	MATTE TIN (SN)	Matte Tin (Sn)	-	-	Matte Tin (Sn)
width	5 mm	4 mm	4.4 mm	4.4 mm	4.4 mm	-
Maker	-	Exar	Exar	Exar	Exar	Exar
Humidity sensitivity level	-	3	1	1	1	1

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