Operation; Transfer Modes - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

7.5

Operation

7.5.1

Transfer Modes

Table 7.4 lists the DMAC transfer modes.
Table 7.4 DMAC Transfer Modes
Transfer Mode
Short Dual address mode
address
(1) Sequential mode
mode
•
1-byte or 1-word transfer
for a single transfer
request
•
Memory address
incremented or
decremented by 1 or 2
•
Number of transfers: 1 to
65,536
(2) Idle mode
•
1-byte or 1-word transfer
for a single transfer
request
•
Memory address fixed
•
Number of transfers: 1 to
65,536
(3) Repeat mode
•
1-byte or 1-word transfer
for a single transfer
request
•
Memory address
incremented or
decremented by 1 or 2
•
Continues transfer after
sending number of
transfers (1 to 256) and
restoring the initial value
Transfer Source
•
TPU channel 0 to 5
compare match/input
capture A interrupt
•
SCI transmission
complete interrupt
•
SCI reception
complete interrupt
•
A/D converter
conversion end
interrupt
•
External request
Remarks
•
Up to 4 channels can
operate independently
•
External request
applies to channel B
only
•
Single address mode
applies to channel B
only
Rev. 1.0, 09/01, page 271 of 904