Datasheet

Section 7 DMA Controller (DMAC)
R01UH0309EJ0500 Rev. 5.00 Page 355 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Transfer Mode Transfer Source Remarks
Normal mode
(1) Auto-request
• Transfer request is
internally held
• Number of transfers (1 to
65,536) is continuously
sent
• Burst/cycle steal transfer
can be selected
• Auto-request
Full
address
mode
(2) External request
• 1-byte or 1-word transfer
for a single transfer
request
• Number of transfers: 1 to
65,536
• External request
• Max. 2-channel
operation, combining
channels A and B
(3) Internal request
• 1-byte or 1-word transfer
for a single transfer
request
• Number of transfers: 1 to
65,536
• USB interrupt
Block transfer mode
• Transfer of 1-block, size
selected for a single
transfer request
• Number of transfers: 1 to
65,536
• Source or destination can
be selected as block area
• Block size: 1 to 256 bytes
or word
• TPU channel 0 to 5
compare match/input
capture A interrupt
• SCI transmit data
empty interrupt
• SCI receive data full
interrupt
• A/D converter
conversion end
interrupt
• USB interrupt
• External request