Datasheet > XR21B1421IL24TR-F

XR21B1421IL24TR-F

更新时间： 2024-11-02 01:12:19

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
50页	463K
描述
Enhanced 1-Ch Full-Speed

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中文翻译

获取价格

数据手册

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XR21B1421

Enhanced 1-Ch Full-Speed

USB HID to UART Bridge

FEATURES

General Description

• ±±15k ꢀES ꢁo UEBS+/UEBS-

• UEB 2.0 Cꢁmpliaot, Full-Epeed (±2Mbps)

• Uoique pre-prꢁgrammed UEB serial oumber

• Ioteroally geoerated 48MHz cꢁre clꢁc5

• ꢀohaoced UART features

The XR21B1421 is an enhanced Universal Asynchronous Receiver and

Transmitter (UART) bridge to HID class USB interface. The USB interface

is fully compliant to the USB 2.0 (Full-Speed) specification with 12 Mbps

USB data transfer rate. The USB interface also supports USB suspend,

resume and remote wakeup operations. The USB Vendor ID, Product ID,

power mode, remote wakeup support, maximum power, and numerous

other settings may be programmed in the no-chip OTP memory via the

USB interface using either HID reports or Exar-supplied OTP program-

ming tools.

• Baud rates up tꢁ ±2 Mbps

• Fractiꢁoal Baud Rate Geoeratꢁr

• 1±2-byte TX aod 1±2-byte RX FIFOs

• Autꢁ Hardware / Eꢁftware Flꢁw Cꢁotrꢁl

• Multidrꢁp aod Half-Suplex Mꢁdes

• Autꢁ RE-481 Half-Suplex Cꢁotrꢁl

• Eelectable GPIO ꢁr Mꢁdem I/O

• Up tꢁ ±0 GPIOs

• 1k tꢁleraot GPIO ioputs

• Euspeod state GPIO cꢁofiguratiꢁo

• Cꢁofigurable clꢁc5 ꢁutput

The XR21B1421 includes an internal oscillator and does not require an

external crystal/oscillator. Any UART baud rate up to 12 Mbps may be

generated with this internal clock and the fractional baud rate generator.

The UART pins for each port may also be configured as GPIO; direction,

state, output driver type and input pull-up or pull-down resistors are pro-

grammed either through on chip OTP, or on the fly via memory mapped

registers.

• 24-pio ꢁr 28-pio QFN pac5age

• Iodustrial -40°C tꢁ +81°C Temperature Raoge

Large 512-byte TX and RX FIFOs prevent buffer overflow errors and opti-

mize data throughput. Automatic half-duplex direction control and optional

multi drop (9-bit) mode simplify both hardware and software in half-duplex

RS-485 applications.

APPLICATIONS

• Pꢁrtable Medical Siagoꢁstics

• Blꢁꢁd Glucꢁse Meters

• Health aod Fitoess Welloess Mꢁoitꢁrs

• Uoioterruptible Pꢁwer Eupplies

• ꢀoergy Maoagemeot Cꢁosꢁles

The XR21B1421 uses the native OS HID driver using HID reports. The

HID reports perform a variety of functions, including device configuration,

transmitting and receiving UART data, and programming of the on-chip

OTP. Exar provides a .dll as an easy to use programming interface to the

HID reports.

The XR21B1421 operates from a single 5V or 3.3V power supply and is

available in a 24 or 28 pin QFN package. When powered with 5V input,

the XR21B1421 supplies a regulated 3.3V output. The 24 pin package

Ordering Information – page 50

has a separate V supply voltage input for the Modem / GPIO pins. The

28 pin package has V internally tied to 3.3V.

Block Diagram

Internal

Oscillator

(48MHz)

Fractional

BRG

512-byte

TX FIFO

512-byte

RX FIFO

USB

USB Slave Interface

Internal

Status and

Control

GPIOs/

Modem IO

Registers

USB

Descriptors

OTP

UART

LDO

3V3

1 / 50

exar.com/XR21B1421

Rev 1B

12 3 4 5 6 7...50

中文翻译

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与XR21B1421IL24TR-F相关器件

型号	品牌	获取价格	描述	数据表
XR21B1421IL28-F	EXAR	获取价格	USB Bus Controller, CMOS, 5 X 5 MM, GREEN, MO-220VHHD-3, QFN-28
XR21B1421IL28TR-F	EXAR	获取价格	Enhanced 1-Ch Full-Speed
XR21B1422	EXAR	获取价格	Enhanced 2-Ch Full-Speed USB UART
XR21B1422IL40-0A	EXAR	获取价格	Enhanced 2-Ch Full-Speed USB UART
XR21B1422IL40-F	EXAR	获取价格	USB Bus Controller, CMOS, 6 X 6 MM, GREEN, MO-220VJJD-5, QFN-40
XR21B1422IL40TR-F	EXAR	获取价格	USB Bus Controller, CMOS, 6 X 6 MM, GREEN, MO-220VJJD-5, QFN-40
XR21B1424	EXAR	获取价格	Enhanced 4-Ch Full-Speed USB UART
XR21B1424_17	EXAR	获取价格	Enhanced 4-Ch Full-Speed USB UART
XR21B1424IV64-0A-EVB	EXAR	获取价格	Enhanced 4-Ch Full-Speed USB UART
XR21B1424IV64-F	EXAR	获取价格	USB Bus Controller, CMOS, PQFP64, LQFP-64

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