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參數(shù)資料
| 型號(hào)： | XR21V1412IL32TR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC USB UART FIFO FULL SPD 32QFN |
| 產(chǎn)品培訓(xùn)模塊： | XR21V141x Full-Speed USB UART Family |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 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 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 帶卷 (TR) |
| 配用： | 1016-1301-ND - EVAL BOARD FOR XR21V1412IL |
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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 |
|---|---|
| XR21V1414 | 制造商:EXAR 制造商全稱:EXAR 功能描述:4-CH FULL-SPEED USB UART |
| XR21V1414_10 | 制造商:EXAR 制造商全稱:EXAR 功能描述:4-CH FULL-SPEED USB UART |
| XR21V1414IM-0A-EB | 功能描述:界面開發(fā)工具 Eval Board for XR21V1414IM48-F RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR21V1414IM-0B-EB | 功能描述:界面開發(fā)工具 For XR21V1414 TQFP48 USB, RS232;No Cables RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR21V1414IM48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:4-CH FULL-SPEED USB UART |
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