V DMA BLOCK: IDMA (Intelligent DMA)
S1C33L03 FUNCTION PART
EPSON
B-V-3-9
A-1
B-V
IDMA
Successive transfer mode
The channels for which DMOD in control information is set to "01" operate in successive transfer mode. In
this mode, a data transfer is performed by one trigger a number of times as set by the transfer counter. The
transfer counter is decremented to "0" by one transfer executed.
The operation of IDMA in successive transfer mode is shown by the flow chart in Figure 3.2.
START
END
Calculates address of
control information
Loads channel
control information
Transfers one unit of data
Transfer counter - 1
Saves channel
control information
IDMA interrupt processing
(if interrupt is enabled)
Transfer
counter = 0
A
Base a (Channel number
×
12)
B (3 words)
C (Data read from source of transfer)
D (Data write to destination of transfer)
E
F (3 words)
N
Trigger
Y
A
B1 B2 B3 C1 D1 E1
Cn Dn En F1 F2 F3
Figure 3.2 Operation Flow in Successive Transfer Mode
(1) When a trigger is accepted, the address for control information is calculated from the base address and
channel number.
(2) Control information is read from the calculated address into the internal temporary register.
(3) Data of the size set in the control information is read from the source address.
(4) The read data is written to the destination address.
(5) The address is incremented or decremented and the transfer counter is decremented.
(6) Steps (3) to (5) are repeated until the transfer counter reaches 0.
(7) The modified control information is written to RAM.
(8) In the case of a hardware trigger, the interrupt control bits are processed before completing IDMA.
Condition
Interrupt factor flag
IDMA request bit
IDMA enable bit
Transfer counter
≠
"0":
Reset ("0")
Not changed ("1")
Not changed ("1")
Transfer counter = "0", DINTEN = "1":
Not changed ("1")
Reset ("0")
Not changed ("1")
Transfer counter = "0", DINTEN = "0":
Reset ("0")
Not changed ("1")
Reset ("0")
Summary of Contents for CMOS 32-Bit Single Chip Microcomputer S1C33L03
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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 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 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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