h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 213
h8s-2161b
Manufacturer Part Number
h8s-2161b
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2161B.pdf
(845 pages)
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7.5.4
Setting the CHNE bit in MRB to 1 enables a number of data transfers to be performed
consecutively in response to a single transfer request. SAR, DAR, CRA, CRB, MRA, and MRB,
which define data transfers, can be set independently.
Figure 7.8 shows the overview of chain transfer operation. When activated, the DTC reads the
register information start address stored at the DTC vector address, and then reads the first register
information at that start address. After the data transfer, the CHNE bit will be tested. When it has
been set to 1, DTC reads the next register information located in a consecutive area and performs
the data transfer. These sequences are repeated until the CHNE bit is cleared to 0.
In the case of transfer with the CHNE bit set to 1, an interrupt request to the CPU is not generated
at the end of the specified number of transfers or by setting of the DISEL bit to 1, and the interrupt
source flag for the activation source is not affected.
DTC vector
address
Chain Transfer
Register information
start address
Figure 7.8 Chain Transfer Operation
Register information
Register information
CHNE = 1
CHNE = 0
Section 7 Data Transfer Controller (DTC)
Rev. 3.00 Mar 21, 2006 page 159 of 788
REJ09B0300-0300
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Source
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