Zilog Z16C30 Bedienungsanleitung PDF herunterladen (Seite 8)

Z16C30 USC

USER'S MANUAL

ZILOG

UM97USC0100

CHAPTER TITLE AND SUBSECTIONS PAGE

Chapter 7 Interrupts

7.1 Introduction ....................................................................................................... 7-1

7.2 Interrupt Acknowledge Daisy-Chains................................................................ 7-1

7.3 External Interrupt Control Logic ........................................................................ 7-2

7.4 Using /RxReq and /TxReq as Interrupt Requests ............................................. 7-3

7.5 Interrupt Types & Sources................................................................................. 7-4

7.6 Internal Interrupt Operation ............................................................................... 7-6

7.7 Details of the Model........................................................................................... 7-8

7.8 Interrupt Option in the BCR ............................................................................... 7-9

7.9 Interrupt Acknowledge Cycles .......................................................................... 7-9

7.10 Interrupt Acknowledge vs. Read Cycles ......................................................... 7-14

7.11 Interrupt Types ................................................................................................ 7-14

7.11.1 Receive Status Interrupt Sources and IA Bits ...................................... 7-14

7.11.2 Receive Data Interrupts ........................................................................ 7-15

7.11.3 Transmit Status Interrupt Sources and IA Bits...................................... 7-18

7.11.4 Transmit Data Interrupts ....................................................................... 7-19

7.11.5 I/O Pin Interrupt Sources and IA Bits.................................................... 7-20

7.11.6 Miscellaneous Interrupt Sources and IA Bits ....................................... 7-20

7.12 Interrupt Pending and Under Service Bits ...................................................... 7-21

7.13 Interrupt Enable Bits ........................................................................................ 7-22

7.14 Channel Interrupt Options ............................................................................... 7-22

7.15 Interrupt Vectors .............................................................................................. 7-23

7.16 Software Requirements ................................................................................... 7-24

7.16.1 Nested Interrupts .................................................................................. 7-24

7.16.2 Which Type(s) to Handle? .................................................................... 7-24

7.16.3 Handling a Type ................................................................................... 7-25

7.16.4 Exiting the ISR ...................................................................................... 7-27

Chapter 8 Software Summary

8.1 Introduction ....................................................................................................... 8-1

8.2 About Resetting ................................................................................................. 8-1

8.3 Programming Order .......................................................................................... 8-2

8.4 Using DMA to Initialize a Channel ..................................................................... 8-2

8.5 Determining the Device Revision Level............................................................. 8-3

8.6 Tips & Techniques............................................................................................. 8-3

8.6.1 Common Hardware Problems ................................................................ 8-3

8.6.2 Common Software Problems .................................................................. 8-3

8.7 Test Modes ........................................................................................................ 8-6

8.8 Register Reference.......................................................................................... 8-10

8.8.1 Register Addresses .............................................................................. 8-10

8.8.2 Conditions/Context ............................................................................... 8-10

8.8.3 Description ........................................................................................... 8-10

8.8.4 RW Status ............................................................................................. 8-10

UM009402-0201

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