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參數(shù)資料
| 型號： | R8820LV |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16-BIT RISC MICROCONTROLLER |
| 中文描述： | 16位RISC微控制器 |
| 文件頁數(shù)： | 71/98頁 |
| 文件大?。?/td> | 1000K |
| 代理商： | R8820LV |
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R DC
RISC DSP Controller
R8820LV
RDC Semiconductor Co.
Rev:1.0
Subject to change without notice
71
data, and the DCE can not send the request to send signal.
The DCE/DTE protocol communication step:
a. DTE send data to DCE
b.RTSsignal is asserted by DTE when data is available.
c. TheRTSsignal is interpreted by the DCE device as a request to enable its receiver.
d. The DCE asserts the
RTR
signal to response that DCE is ready to receive data.
17.1.2 CTS/RTR Protocol
The serial port can be programmed as a CTS/RTS protocol by clearing both ENRX bit and RTS bit. This protocol is a
symmetric interface, which provides flow control when both ports are sending and receiving data.
17.2 DMA Transfer to/from a serial port function
DMA transfers to the serial port function as destination-synchronized DMA transfers. A new transfer is requested when the
Transmit Holding Register is empty. When the port is configured for DMA transmits, the corresponding transmit interrupt is
disabled regardless of the TXIE bit setting.
DMA transfers from the serial port function as source-synchronized DMA transfers. A new transfer is requested when the
Receive Buffer contains valid data. When the port is configured for DMA receives, the corresponding receive interrupt is
disabled regardless of the RXIE bit setting.
The DMA request is generated internally when a DMA channel is being used for serial port transfers. And the DRQ0 or
DRQ1 are not active when a serial port DMA transfers.
Hardware handshaking may be used in conjunction with serial port DMA transfers.
DCE
DTE
ENRX
RTS
RTR
CTS
DCE/DTE Protocol Connection
RTS:Request to send
CTS:Clear to send
RTR:Ready to receive
ENRX:Enable receiver request
RTR
CTS
CTS/RTR Protocol Connection
CTS:Clear to send
RTR:Ready to receive
CTS
RTR
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| R8821 | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
| R8822 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RDC 16 Bit RISC MICRO-CONTROLLER |
| R8822I | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
| R8830 | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
| R8830I | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
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