6-4
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
6.4.1.
Transfer Source End Pointer
Set the source data end address. The address of data to be transferred should be set as it is if the
transfer source ad- dress is not incremented.
6.4.2.
Transfer Destination End Pointer
Set the address to which the last transfer data is written. The address for writing transfer data should be
set as it is if the transfer destination address is not incremented.
6.4.3.
Control Data
Set the DMA transfer information. Figure 6.4.3.1 shows the constituent elements of the control data.
31 30 29 28
27 26 25 24
23 22 21 20
19 18 17 16
15 14 13 12
11 10 9 8
7 6 5 4
3 2 1 0
dst_inc
dst_size
src_inc
src_size
R_power
n_minus_1
cycle_ctrl
Reserved
Figure 6.4.3.1 Constituent Elements of Control Data
dst_inc
Set the increment value of the transfer destination address. The setting value must be equal to or
larger than the transfer data size when the address is incremented.
Table 6.4.3.1 Increment Value of Transfer Destination Address
dst_inc
Increment value
0x3
No increment
0x2
+4
0x1
+2
0x0
+1
dst_size
Set the size of the data to be written to the transfer destination. It should be the same value as the
src_size.
Table 6.4.3.2 Size of Data Written to Transfer Destination
dst_size
Data size
0x3
Reserved
0x2
Word
0x1
Halfword
0x0
Byte
src_inc
Set the increment value of the transfer source address. The setting value must be equal to or larger
than the transfer data size when the address is incremented.
Table 6.4.3.3 Increment Value of Transfer Source Address
src_inc
Increment value
0x3
No increment
0x2
+4
0x1
+2
0x0
+1
src_size
Set the size of the data to be read from the transfer source. It should be the same value as the
dst_size.
Table 6.4.3.4 Size of Data Read from Transfer Source
src_size
Data size
0x3
Reserved
0x2
Word
0x1
Halfword
0x0
Byte
Summary of Contents for S1C31D50
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