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參數(shù)資料
| 型號： | XR19L200IL32-0A-EB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 5/40頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR XR19L200 32QFN |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
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XR19L200
13
REV. 1.0.2
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
2.14.1.2
UART active, charge pump of RS-232 transceiver shut down
If the ACP pin is HIGH and the UART portion of the L200 is not in sleep mode, then the charge pump will
automatically shut down to conserve power if the following conditions are true:
■ no activity on the TXD output signals
■ RXD input signal has been idling LOW for approximately 30 seconds
When these conditions are satisfied, the L200 shuts down the charge pump and tri-states the RS-232 drivers
to conserve power. In this mode, the RS-232 receivers are fully active and the internal registers of the L200
can be accessed. The time for the charge pump to resume normal operation after exiting the sleep mode is
typically 45
s. It will wake up by any of the following:
■ a receive data start bit transition on the RXD input (LOW to HIGH)
■ a data byte is loaded to the transmitter, THR or FIFO
Because the receivers are fully active when the charge pump is turned off, any data received will be transferred
to/from the UART without any issues.
2.14.2
Full Sleep Mode
In full sleep mode, the L210 shuts down the charge pump and the internal oscillator. The L210 enters the full
sleep mode if the following conditions are satisfied:
■ the UART portion of the L210 is already in sleep mode (no output on XTAL2)
■ the ACP (Autosleep for Charge Pump) pin is HIGH
When these conditions are satisfied, both the UART and the charge pump will be in the sleep mode. In this
mode, the RS-232 receivers are fully active and the internal registers of the L200 can be accessed. The L200
exits the full sleep mode if either the ACP pin becomes LOW or the internal oscillator starts up. The time for the
charge pump to resume normal operation after exiting the full sleep mode is typically 45
s.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR19L200IL32-0B-EB | 功能描述:界面開發(fā)工具 Supports L200 32 pin QFN, PCI 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 |
| XR19L200IL32-F | 功能描述:UART 接口集成電路 UART 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 |
| XR19L202 | 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER |
| XR19L202IL48 | 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER |
| XR19L202IL48-0B-EB | 功能描述:界面開發(fā)工具 Supports L202 48 pin QFN,PCI 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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