h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 208
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h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
- Current page: 208 of 927
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Section 7 Data Transfer Controller (DTC)
7.5
The DTC stores register information in on-chip RAM. When activated, the DTC reads register
information in on-chip RAM and transfers data. After the data transfer, the DTC writes updated
register information back to on-chip RAM. The pre-storage of register information in memory
makes it possible to transfer data over any required number of channels. The transfer mode can be
specified as normal, repeat, or block transfer mode. Setting the CHNE bit in MRB to 1 makes it
possible to perform a number of transfers with a single activation source (chain transfer).
The 24-bit SAR designates the DTC transfer source address, and the 24-bit DAR designates the
transfer destination address. After each transfer, SAR and DAR are independently incremented,
decremented, or left fixed depending on its register information.
Rev. 3.00 Jan 25, 2006 page 156 of 872
REJ09B0286-0300
Operation
Read register information
Write register information
Clear an activation flag
Transfer counter = 0
Figure 7.4 DTC Operation Flowchart
Read DTC vector
Data transfer
or DISEL = 1
CHNE = 1
No
No
Start
End
Yes
Yes
Next transfer
Interrupt exception
Clear DTCER
handling
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