REV. 1.3.0 3.3.11 RS485_DELAY Register Description (Read/Write) RS485_DELAY[3:0]: Turn-around delay This " />
參數(shù)資料
型號(hào)： XR21V1412IL32-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 17/32頁(yè)
文件大?。?/td> 0K
描述： IC UART FIFO USB DUAL 32QFN
產(chǎn)品培訓(xùn)模塊： UART Product Overview
XR21V141x Full-Speed USB UART Family
特色產(chǎn)品： XR21V141x Full-Speed USB UART
標(biāo)準(zhǔn)包裝： 490
特點(diǎn)： *
通道數(shù)： 2，DUART
FIFO's： 128 字節(jié)，384 字節(jié)
規(guī)程： USB 2.0
電源電壓： 2.97 V ~ 3.63 V
帶自動(dòng)流量控制功能： 是
安裝類(lèi)型： 表面貼裝
封裝/外殼： 32-VFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 32-QFN 裸露焊盤(pán)（5x5）
包裝： 托盤(pán)
配用： 1016-1301-ND - EVAL BOARD FOR XR21V1412IL
其它名稱(chēng)： 1016-1302
XR21V1412
24
2-CH FULL-SPEED USB UART
REV. 1.3.0
3.3.11
RS485_DELAY Register Description (Read/Write)
RS485_DELAY[3:0]: Turn-around delay
This is the number of bit times the V1412 waits before de-asserting the GPIO5/RTS#/RS485 pin when it is
configured for automatic RS-485 half-duplex control.
RS485_DELAY[7:4]: Reserved
These bits are reserved and should be ’0’.
3.3.12
GPIO_MODE Register Description (Read/Write)
GPIO_MODE[2:0]: GPIO Mode Select
There are 4 modes of operation for the GPIOs. The descriptions can be found in “Section 1.5, UART” on
page 9.
GPIO_MODE[3]: RS485 Polarity
Logic 0 = GPIO5/RTS#/RS485 Low for TX
Logic 1 = GPIO5/RTS#/RS485 High for TX
GPIO_MODE[7:4]: Reserved
These register bits are reserved. When writing to these bits, the value should be ’0’. When reading from these
bits, they are undefined and should be ignored.
3.3.13
GPIO_DIRECTION Register Description (Read/Write)
This register controls the direction of pins configured as GPIO. (Pins configured for UART functions via the
GPIO_MODE register, e.g. RTS# are not controlled or reported in the GPIO_DIRECTION register.)
GPIO_DIRECTION[5:0]: GPIOx Direction
Logic 0 = GPIOx is an input.
Logic 1 = GPIOx is an output.
GPIO_DIRECTION[7:6]: Reserved
These register bits are reserved and should be ’0’.
TABLE 14: GPIO MODES
BITS
[2:0]
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
MODE DESCRIPTION
000
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO Mode, All GPIO pins available as GPIO
001
GPIO0
GPIO1
GPIO2
GPIO3
CTS#
RTS#
GPIO4 and GPIO5 used for Auto RTS/CTS HW
Flow Control
010
GPIO0
GPIO1
DSR#
DTR#
GPIO4
GPIO5
GPIO2 and GPIO3 used for Auto DTR/DSR HW
Flow Control
011
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
RS485
GPIO5 used for auto RS-485 half-duplex control
100
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4
RS485
GPIO5 used for auto RS-485 half-duplex control
after address match (See FLOW_CONTROL
mode 4).
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR21V1412IL32TR-F 功能描述:USB 接口集成電路 2 Chan FS USB UART w/ 256 Byte FIFO RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類(lèi)型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
XR21V1414 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:4-CH FULL-SPEED USB UART
XR21V1414_10 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:4-CH FULL-SPEED USB UART
XR21V1414IM-0A-EB 功能描述:界面開(kāi)發(fā)工具 Eval Board for XR21V1414IM48-F RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
XR21V1414IM-0B-EB 功能描述:界面開(kāi)發(fā)工具 For XR21V1414 TQFP48 USB, RS232;No Cables RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
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