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Z80C30 Datasheet(PDF) 13 Page - Zilog, Inc. |
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Z80C30 Datasheet(HTML) 13 Page - Zilog, Inc. |
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13 / 81 page  PS011706-0511 Pin Descriptions CMOS SCC Serial Communications Controller Product Specification 5 Pin Descriptions The following links refer to descriptions of the pin functions common to the Z85C30 and Z80C30 devices. • CTSA, CTSB • DCDA, DCDB • DTR/REQA, DTR/REQB • IEI • IEO • INT • INTACK • PCLK • RxDA, RxDB • RTxCA, RTxCB • RTSA, RTSB • SYNCA, SYNCB • TxDA, TxDB • TRxCA, TRxCB • W/REQA, W/REQB CTSA, CTSB Clear To Send (inputs, active Low) . If these pins are programmed for Auto Enable functions, a Low on the inputs enables the respective transmitters. If not programmed as Auto Enable, these pins can be used as general-purpose inputs. Both inputs are Schmitt- trigger buffered to accommodate slow rise-time inputs. The SCC detects pulses on these inputs and can interrupt the CPU on both logic level transitions. DCDA, DCDB Data Carrier Detect (inputs, active Low) . These pins function as receiver enables if programmed for Auto Enable. Otherwise, these pins are used as general-purpose input |
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