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參數(shù)資料
| 型號： | XR20M1280L40-0A-EB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 13/63頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR20M1280L40 |
| 產(chǎn)品培訓模塊： | XR21V141x Full-Speed USB UART Family UARTs with Integrated Level Shifters |
| 標準包裝： | 1 |
| 主要目的： | 接口，UART |
| 已用 IC / 零件： | XR20M1280L40 |
| 已供物品： | 板 |
| 其它名稱： | 1016-1628 |
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XR20M1280
20
I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
REV. 1.0.0
1.11
Auto RTS (Hardware) Flow Control
Automatic RTS hardware flow control is used to prevent data overrun to the local receiver FIFO. The RTS#
output is used to request remote unit to suspend/resume data transmission. The auto RTS flow control
features is enabled to fit specific application requirement (see Figure 18):
Enable auto RTS flow control using EFR bit-6.
The auto RTS function must be started by asserting RTS# output pin (MCR bit-1 to logic 1 after it is enabled).
If using the Auto RTS interrupt:
Enable RTS interrupt through IER bit-6 (after setting EFR bit-4). The UART issues an interrupt when the
RTS# pin makes a transition from low to high: ISR bit-5 will be set to logic 1.
1.12
Auto RTS Hysteresis
With the Auto RTS function enabled, an interrupt is generated when the receive FIFO reaches the selected RX
trigger level. The RTS# pin will not be forced HIGH (RTS off) until the receive FIFO reaches one trigger level
above the selected trigger level in the trigger table (Table 13). The RTS# pin will return LOW after the RX FIFO
is unloaded to one level below the selected trigger level. Under the above described conditions, the M1280 will
continue to accept data until the receive FIFO gets full. The Auto RTS function is initiated when the RTS#
selected.
TABLE 7: AUTO RTS (HARDWARE) FLOW CONTROL
RX TRIGGER LEVEL
IRQ# PIN ACTIVATION
RTS# DE-ASSERTED (HIGH)
(CHARACTERS IN RX FIFO)
RTS# ASSERTED (LOW)
(CHARACTERS IN RX FIFO)
8
16
0
16
56
8
56
60
16
60
56
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相關代理商/技術參數(shù) |
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|---|---|
| XR20M1280L40-0B-EB | 功能描述:UART 接口集成電路 EVAL F/M1280 QFN40 SPI INTERFACE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR20V2170 | 制造商:EXAR 制造商全稱:EXAR 功能描述:I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER |
| XR20V2170IL40 | 制造商:EXAR 制造商全稱:EXAR 功能描述:I2C/SPI UART WITH 64-BYTE FIFO AND RS232 TRANSCEIVER |
| XR20V2170IL40-F | 功能描述:UART 接口集成電路 Transceiver RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| XR20V2170L40-0A-EB | 功能描述:界面開發(fā)工具 Supports V2170 40pin QFN,I2C Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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