tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 153
tmp1940cyaf
Manufacturer Part Number
tmp1940cyaf
Description
32-bit Tx System Risc Tx19 Family
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP1940CYAF.pdf
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10.4.7
Data Packing and Unpacking
DMAC if the programmed transfer size is not equal to the device port size.
wide, four byte-read cycles occur. The four bytes of data are buffered in the DHR before a destination
word-write cycle occurs.
In dual-address mode, the internal 32-bit DHR allows the data to be packed and unpacked by the
For example, if a source I/O peripheral is 8-bits wide and a destination memory device is 32-bits
The following illustrates the byte ordering for packing and unpacking of data.
4n
4n
4n
4n
3
2
1
0
8
I/O Device
D
C
B
A
Figure 10.13 Data Packing and Unpacking
0
TMP1940CYAF-111
Little-Endian
31
D
C
DHR
TMP1940CYAF
B
A
0
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