Zilog Z16C30 Manual de usuario descargar pdf (Pagina 11)

Z16C30 USC

USER'S MANUAL

vii

ZILOG

UM97USC0100

FIGURE TITLES PAGE

Chapter 5

Figure 5-1. Asynchronous Data ................................................................................ 5-2

Figure 5-2. Character Oriented Synchronous Data .................................................. 5-2

Figure 5-3. HDLC/SDLC Data ................................................................................... 5-4

Figure 5-4. The Channel Mode Register (CMR) ....................................................... 5-6

Figure 5-5. The Transmit Mode Register (TMR)........................................................ 5-6

Figure 5-6. The Receive Mode Register (RMR) ........................................................ 5-6

Figure 5-7. Carrier Detection for a Received Ethernet Frame ................................ 5-16

Figure 5-8. The Channel Command/Status Register (CCSR) ................................. 5-21

Figure 5-9. A Model of the Receive Datapath......................................................... 5-24

Figure 5-10. How a USC Channel Provides the "Queued" Status Bits in the RCSR. 5-27

Figure 5-11. The Transmit Command/Status Register (TCSR) ................................. 5-28

Figure 5-12. The Receive Command/Status Register (RCSR).................................. 5-29

Figure 5-13. A Model of the Transmit Character Counter Feature............................ 5-33

Figure 5-14. A Model of the Receive Character Counter Feature ............................ 5-34

Figure 5-15. The Channel Command/Status Register (CCSR) ................................. 5-37

Figure 5-16. The Channel Control Register (CCR) ................................................... 5-37

Figure 5-17. A 32-Bit Transmit Control Block in a DMA Buffer ................................. 5-37

Figure 5-18. A 32-Bit Receive Status Block in a DMA Buffer.................................... 5-38

Figure 5-19. The Channel Command/Address Register (CCAR) ............................. 5-41

Chapter 6

Figure 6-1. Flowthrough DMA Transfer Memory to Peripheral Device ..................... 6-2

Figure 6-2. Flowthrough DMA Transfer, Peripheral Device to Memory .................... 6-3

Figure 6-3. Flyby DMA Transfer, Memory to Peripheral Device ............................... 6-4

Figure 6-4. *Flyby DMA Transfer, Peripheral Device to Memory .............................. 6-5

UM009402-0201

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Zilog Z16C30 Manual de usuario Pagina 11