h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 223
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h8s-2138
Manufacturer Part Number
h8s-2138
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2138.pdf
(1061 pages)
- Current page: 223 of 1061
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7.3
7.3.1
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 7.2 shows a flowchart of DTC operation.
Operation
Overview
Read register information
Write register information
Transfer counter = 0
Clear activation flag
Read DTC vector
or DISEL = 1?
Data transfer
CHNE = 1?
No
No
Figure 7.2 Flowchart of DTC Operation
Start
End
Section 7 Data Transfer Controller [H8S/2138 Group]
Yes
Yes
Next transfer
Rev. 4.00 Jun 06, 2006 page 169 of 1004
Interrupt exception
Clear DTCER
handling
REJ09B0301-0400
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