Panasonic GT02 Manual page 38

[WDW] Write data area in word unit
Data is written in the word device area of the GT in word unit.
Command
[BDW] Write data area in byte unit
Data is written in the word device area of the GT in byte unit.
Command
[DDW] Write data area in digit unit
Data is written in the word device area of the GT in digit unit.
Command
[SDW] Write data area in bit unit
Data is written in the word device area of the GT in bit unit.
Command
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