h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 234

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller [H8S/2138 Group]
7.3.8
Setting the CHNE bit 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 7.9 shows memory mapping for chain transfer.
In the case of transfer with CHNE 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.
Rev. 4.00 Jun 06, 2006 page 180 of 1004
REJ09B0301-0400
DTC vector
address
Chain Transfer
Register information
start address
Figure 7.9 Memory Mapping in Chain Transfer
Register information
Register information
CHNE = 1
CHNE = 0
Destination
Destination
Source
Source