HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 334
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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Section 7 DMA Controller (Not Supported in the H8S/2321)
7.6
The sources of interrupts generated by the DMAC are transfer end and transfer break. Table 7.14
shows the interrupt sources and their priority order.
Table 7.14 Interrupt Source Priority Order
Interrupt
Name
DEND0A
DEND0B
DEND1A
DEND1B
Enabling or disabling of each interrupt source is set by means of the DTIE bit for the
corresponding channel in DMABCR, and interrupts from each source are sent to the interrupt
controller independently.
The relative priority of transfer end interrupts on each channel is decided by the interrupt
controller, as shown in table 7.14.
Figure 7.39 shows a block diagram of a transfer end/transfer break interrupt. An interrupt is
always generated when the DTIE bit is set to 1 while the DTE bit is cleared to 0.
In full address mode, a transfer break interrupt is generated when the DTME bit is cleared to 0
while the DTIEB bit is set to 1.
In both short address mode and full address mode, DMABCR should be set so as to prevent the
occurrence of a combination that constitutes a condition for interrupt generation during setting.
Rev.6.00 Sep. 27, 2007 Page 304 of 1268
REJ09B0220-0600
Interrupts
DTE/
DTME
Figure 7.39 Block Diagram of Transfer End/Transfer Break Interrupt
DTIE
Interrupt due to end of
transfer on channel 0A
Interrupt due to end of
transfer on channel 0B
Interrupt due to end of
transfer on channel 1A
Interrupt due to end of
transfer on channel 1B
Short Address Mode
Interrupt Source
Interrupt due to end of
transfer on channel 0
Interrupt due to break in
transfer on channel 0
Interrupt due to end of
transfer on channel 1
Interrupt due to break in
transfer on channel 1
Full Address Mode
Transfer end/transfer
break interrupt
Priority Order
High
Low
Interrupt
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