h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 219
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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: 219 of 1061
- Download datasheet (6Mb)
7.2.3
Bit
Initial value
Read/write
SAR is a 24-bit register that designates the source address of data to be transferred by the DTC.
For word-size transfer, specify an even source address.
7.2.4
Bit
Initial value
Read/write
DAR is a 24-bit register that designates the destination address of data to be transferred by the
DTC. For word-size transfer, specify an even destination address.
7.2.5
Bit
Initial value
Read/Write
CRA is a 16-bit register that designates the number of times data is to be transferred by the DTC.
In normal mode, the entire CRA register functions as a 16-bit transfer counter (1 to 65,536). It is
decremented by 1 every time data is transferred, and transfer ends when the count reaches H'0000.
In repeat mode or block transfer mode, CRA is divided into two parts: the upper 8 bits (CRAH)
and the lower 8 bits (CRAL). CRAH holds the number of transfers while CRAL functions as an 8-
bit transfer counter (1 to 256). CRAL is decremented by 1 every time data is transferred, and the
contents of CRAH are transferred when the count reaches H'00. This operation is repeated.
DTC Destination Address Register (DAR)
DTC Transfer Count Register A (CRA)
DTC Source Address Register (SAR)
Unde-
Unde-
Unde-
fined
fined
fined
23
23
15
—
—
—
Unde-
Unde-
Unde-
fined
fined
fined
22
22
14
—
—
—
Unde-
Unde-
Unde-
fined
fined
fined
21
21
13
—
—
—
Unde-
Unde-
Unde-
fined
fined
fined
20
20
12
—
—
—
CRAH
Unde-
Unde-
Unde-
fined
fined
fined
19
19
11
—
—
—
Unde-
fined
10
—
Section 7 Data Transfer Controller [H8S/2138 Group]
Unde-
fined
—
9
Unde-
fined
—
8
Rev. 4.00 Jun 06, 2006 page 165 of 1004
Unde-
fined
—
7
Unde-
fined
—
6
Unde-
fined
—
5
Unde-
Unde-
Unde-
fined
fined
fined
—
—
—
4
4
4
CRAL
Unde-
Unde-
Unde-
fined
fined
fined
—
—
—
3
3
3
REJ09B0301-0400
Unde-
Unde-
Unde-
fined
fined
fined
—
—
—
2
2
2
Unde-
Unde-
Unde-
fined
fined
fined
—
—
—
1
1
1
Unde-
Unde-
Unde-
fined
fined
fined
—
—
—
0
0
0
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