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7.3.3
Execute Transfer Count Registers (ETCR)
An execute transfer count register (ETCR) is a 16-bit readable/writable register that specifies the
number of transfers to be executed. The functions of these registers differ between normal mode
and block transfer mode.
• Normal mode
ETCRA
Bit
15
Initial value
Read/Write
R/W
ETCRB: Is not used in normal mode.
In normal mode ETCRA functions as a 16-bit transfer counter. The count is decremented by 1
each time one transfer is executed. The transfer ends when the count reaches H'0000. ETCRB is
not used.
14
13
12
11
10
R/W
R/W
R/W
R/W
R/W
9
8
7
6
5
Undetermined
R/W
R/W
R/W
R/W
R/W
Transfer counter
Rev. 4.00 Jan 26, 2006 page 221 of 938
Section 7 DMA Controller
4
3
2
1
R/W
R/W
R/W
R/W
R/W
REJ09B0276-0400
0
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