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參數(shù)資料
| 型號： | XR21V1412IL-0B-EB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR21V1412IL |
| 產(chǎn)品培訓模塊： | UART Product Overview XR21V141x Full-Speed USB UART Family |
| 標準包裝： | 1 |
| 主要目的： | 接口，USB 2.0 至 UART |
| 嵌入式： | 否 |
| 已用 IC / 零件： | XR21V1412IL |
| 已供物品： | 板 |
| 其它名稱： | 1016-1426 |
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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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XR21V1412IL32 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2-CH FULL-SPEED USB UART |
| XR21V1412IL32-F | 功能描述:USB 接口集成電路 2-Ch 12Mbps 48MHz Internal clock; UART RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型: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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| 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 |
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