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| 型號： | 935027000518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 25/34頁 |
| 文件大小： | 250K |
| 代理商： | 935027000518 |
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SCC2692
Information as of 2000-08-23
SCC2692; Dual asynchronous receiver/transmitter (DUART)
The Philips Semiconductors SCC2692 Dual Universal Asynchronous Receiver/Transmitter (DUART) which is compatible with the
SCN2681. It is a single-chip CMOS-LSI communications device that provides two full-duplex asynchronous receiver/transmitter channels in
a single package. It interfaces directly with microprocessors and may be used in a polled or interrupt driven system.
The operating mode and data format of each channel can be programmed independently. Additionally, each receiver and transmitter can
select its operating speed as one of eighteen fixed baud rates, a 16X clock derived from a programmable counter/timer, or an external 1X
or 16X clock. The baud rate generator and counter/timer can operate directly from a crystal or from external clock inputs. The ability to
independently program the operating speed of the receiver and transmitter make the DUART particularly attractive for dual-speed channel
applications such as clustered terminal systems.
Each receiver is quadruply buffered to minimize the potential of receiver over-run or to reduce interrupt overhead in interrupt driven
systems. In addition, a flow control capability is provided to disable a remote DUART transmitter when the receiver buffer is full.
Also provided on the SCC2692 are a multipurpose 7-bit input port and a multipurpose 8-bit output port. These can be used as general
purpose I/O ports or can be assigned specific functions (such as clock inputs or status/interrupt outputs) under program control.
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Dual full-duplex asynchronous receiver/transmitters
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Quadruple buffered receiver data register
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Programmable data format
– 5 to 8 data bits plus parity
– Odd, even, no parity or force parity
– 1, 1.5 or 2 stop bits programmable in 1/16-bit increments
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16-bit programmable Counter/Timer
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Programmable baud rate for each receiver and transmitter selectable from:
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