Figure 5.15 Pio Data-Out Command Protocol - Fujitsu MHW2120BK Maintenance Manual

Interface
4) The device receives the DATA FIS from the host.
5) When all data has been transferred, the device sends the RegDH FIS (with 1
set in the I bit) to complete execution of the command. If the device has an
error, it reports the error. If any data remains to be received by the device,
this protocol is repeated starting from step 3). (The maximum data size is
8 KB.)

Figure 5.15 PIO data-out command protocol

5-180
RegHD
PIO Setup
Host
DATA
RegDH
Device
C141-E261