V DMA BLOCK: IDMA (Intelligent DMA)
S1C33L03 FUNCTION PART
EPSON
B-V-3-7
A-1
B-V
IDMA
IDMA invocation request during a DMA transfer
An IDMA invocation request to another channel that is generated during a DMA transfer is kept pending until
the DMA transfer that was being executed at the time is completed. Since an invocation request is not cleared,
new requests will be accepted when the DMA transfer under execution is completed.
An IDMA invocation request to the same channel canot be accepted while the channel is executing a DMA
transfer because the same interrupt factor is used. Therefore, an interval longer than the DMA transfer period
is required when invoking the same channel.
IDMA invocation request when DMA transfer is disabled
An IDMA invocation request generated when IDMAEN is "0" (DMA transfer disabled) is kept pending until
IDMAEN is set to "1". Since an invocation request is not cleared, it is accepted when DMA transfer is
enabled.
Simultaneous generation of a software trigger and a hardware trigger
When a software trigger and the hardware trigger for the same channel are generated simultaneously, the
software trigger starts IDMA transfer. The IDMA transfer by the hardware trigger is not executed since the
interrupt factor is reset when the DMA transfer is completed. However, an operation like this cannot be
recommended.
Summary of Contents for CMOS 32-Bit Single Chip Microcomputer S1C33L03
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Page 15: ...S1C33L03 PRODUCT PART ...
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Page 149: ...S1C33L03 FUNCTION PART I OUTLINE ...
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Page 162: ...I OUTLINE LIST OF PINS B I 3 8 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 163: ...S1C33L03 FUNCTION PART II CORE BLOCK ...
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Page 172: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 176: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 224: ...II CORE BLOCK BCU Bus Control Unit B II 4 48 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 262: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 263: ...S1C33L03 FUNCTION PART III PERIPHERAL BLOCK ...
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Page 266: ...III PERIPHERAL BLOCK INTRODUCTION B III 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 322: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 415: ...S1C33L03 FUNCTION PART IV ANALOG BLOCK ...
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Page 434: ...IV ANALOG BLOCK A D CONVERTER B IV 2 16 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 435: ...S1C33L03 FUNCTION PART V DMA BLOCK ...
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Page 492: ...V DMA BLOCK IDMA Intelligent DMA B V 3 18 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 493: ...S1C33L03 FUNCTION PART VI SDRAM CONTROLLER BLOCK ...
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Page 531: ...S1C33L03 FUNCTION PART VII LCD CONTROLLER BLOCK ...
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Page 579: ...S1C33L03 FUNCTION PART Appendix I O MAP ...
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