p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 177
p2125vps20
Manufacturer Part Number
p2125vps20
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.P2125VPS20.pdf
(700 pages)
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7.5.3
In block transfer mode, one activation source transfers one block of data. Either the transfer source
or the transfer destination is designated as a block area. Table 7.5 lists the register functions in
block transfer mode. The block size can be between 1 and 256. When the transfer of one block
ends, the initial state of the block size counter and the address register that is specified as the block
area is restored. The other address register is then incremented, decremented, or left fixed
according to the register information. From 1 to 65,536 transfers can be specified. Once the
specified number of transfers has been completed, a CPU interrupt is requested.
Table 7.5
Name
DTC source address register
DTC destination address register
DTC transfer count register AH
DTC transfer count register AL
DTC transfer count register B
SAR
DAR
or
Block Transfer Mode
Register Functions in Block Transfer Mode
Figure 7.7 Memory Mapping in Block Transfer Mode
N th block
1st block
•
•
•
Abbreviation
SAR
DAR
CRAH
CRAL
CRB
Transfer
Block area
Function
Transfer source address
Transfer destination address
Holds block size
Block size counter
Transfer counter
Rev. 1.00 Sep. 21, 2006 Page 139 of 658
Section 7 Data Transfer Controller (DTC)
REJ09B0310-0100
DAR
SAR
or
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