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Z80C30 Datasheet(PDF) 23 Page - Zilog, Inc. |
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Z80C30 Datasheet(HTML) 23 Page - Zilog, Inc. |
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23 / 81 page  PS011706-0511 Functional Descriptions CMOS SCC Serial Communications Controller Product Specification 15 Functional Descriptions The architecture of the SCC device functions as: • A data communications device which transmits and receives data in various protocols • A microprocessor peripheral in which the SCC offers valuable features such as vec- tored interrupts and DMA support The SCC’s peripheral and data communication features are described in the following sec- tions. Figure 1 on page 4 displays the SCC block diagram. Figures 6 and 7 display the details of the communication between the receive and transmit logic to the system bus. The features and data path for each of the SCC’s A and B channels are identical. Figure 6. SCC Transmit Data Path From Receiver CRC-Gen Zero Insert (5 Bits) 20-Bit TX Shift Register SYNC Register SYNC Register Internal Data Bus To Other Channel Internal TXD TXD NRZ Encode Transmit MUX & 2-Bit Delay Transmit Clock TX Buffer 1 Byte Final TX MUX WRB WR6 Sync Sync SDLC WR7 |
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