HD6432621 Hitachi, HD6432621 Datasheet - Page 233
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HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
(1069 pages)
- Current page: 233 of 1069
- Download datasheet (5Mb)
8.3
8.3.1
When activated, the DTC reads register information that is already stored in memory and transfers
data on the basis of that register information. After the data transfer, it writes updated register
information back to memory. Pre-storage of register information in memory makes it possible to
transfer data over any required number of channels. Setting the CHNE bit to 1 makes it possible to
perform a number of transfers with a single activation.
Figure 8-2 shows a flowchart of DTC operation.
Operation
Overview
Read register information
Write register information
Clear an activation flag
Transfer Counter= 0
Read DTC vector
Data transfer
or DISEL= 1
No
No
CHNE=1
Figure 8-2 Flowchart of DTC Operation
Start
End
Yes
Yes
Next transfer
Interrupt exception
Clear DTCER
handling
189
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