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參數(shù)資料
| 型號(hào)： | XR21V1412IL32-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 10/32頁 |
| 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： | 托盤 |
| 配用： | 1016-1301-ND - EVAL BOARD FOR XR21V1412IL |
| 其它名稱： | 1016-1302 |
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XR21V1412
18
2-CH FULL-SPEED USB UART
REV. 1.3.0
3.3
UART Register Descriptions
All register bits default to a value of ’0’ unless otherwise noted.
3.3.1
UART_ENABLE Register Description (Read/Write)
This register enables the UART TX and RX. For proper functionality, the UART TX and RX must be enabled in
the following order:
FIFO_ENABLE_CHx = 0x1
// Enable TX FIFO
UART_ENABLE = 0x3
// Enable TX and RX of that channel
FIFO_ENABLE_CHx = 0x3
// Enable RX FIFO
UART_ENABLE[0]: Enable UART TX
Logic 0 = UART TX disabled.
Logic 1 = UART TX enabled.
UART_ENABLE[1]: Enable UART RX
Logic 0 = UART RX disabled.
Logic 1 = UART RX enabled.
UART_ENABLE[7:2]: Reserved
These bits are reserved and should remain ’0’.
3.3.2
CLOCK_DIVISOR0, CLOCK_DIVISOR1, CLOCK_DIVISOR2 Register Description (Read/Write)
These registers are used for programming the baud rate. The V1412 uses a 19-bit divisor and 16-bit mask
register. Using the internal 48MHz oscillator, the 19-bit divisor is calculated as follows:
CLOCK_DIVISOR = Trunc ( 48000000 / Baud Rate )
For example, if the the baud rate is 115200bps, then
CLOCK_DIVISOR = Trunc ( 48000000 / 115200 ) = Trunc (416.66667) = 416
CLOCK_DIVISOR0[7:0]: Baud rate clock divisor bits [7:0]
CLOCK_DIVISOR1[7:0]: Baud rate clock divisor bits [15:8]
CLOCK_DIVISOR2[2:0]: Baud rate clock divisor bits [18:16]
CLOCK_DIVISOR2[7:3]: Reserved
These bits are reserved and should remain ’0’.
3.3.3
TX_CLOCK_MASK0, TX_CLOCK_MASK1 Register Description (Read/Write)
A look-up table is used for the value of the 16-bit TX Clock mask registers. The index of the look-up table is
calculated as follows:
index = Trunc ( ( ( 48000000 / Baud Rate ) - CLOCK_DIVISOR ) * 32)
For example, if the baud rate is 115200bps, then the index will be:
index = Trunc ( ( ( 48000000 / 115200 ) - 416 ) * 32) = Trunc (21.3333) = 21
The values for some baud rates to program the TX_CLOCK_MASK registers are listed in Table 8. For baud
rates that are not listed, use the index to select TX_CLOCK_MASK register values from Table 9.
3.3.4
RX_CLOCK_MASK0, RX_CLOCK_MASK1 Register Description (Read/Write)
The values for some baud rates to program the RX_CLOCK_MASK registers are listed in Table 8. For baud
rates that are not listed, use the same index calculated for the TX_CLOCK_MASK register to select
RX_CLOCK_MASK register values from Table 9.
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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: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 |
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