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HD64F2149YV Folha de dados(PDF) 206 Page - Renesas Technology Corp

Nome de Peças HD64F2149YV
Descrição Electrónicos  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1075 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F2149YV Folha de dados(HTML) 206 Page - Renesas Technology Corp

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Section 7 Data Transfer Controller
Rev. 3.00 Jan 18, 2006 page 178 of 1044
REJ09B0280-0300
7.3
Operation
7.3.1
Overview
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.
Start
Read DTC vector
Next transfer
Read register information
Data transfer
Write register information
Clear activation flag
CHNE = 1?
End
No
No
Yes
Yes
Transfer counter = 0
or DISEL = 1?
Clear DTCER
Interrupt exception
handling
Figure 7.2 Flowchart of DTC Operation



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