Setup Stage; Data Stage/Status Stage - Epson S2R72V18 Technical Manual

Fig. 1-35 shows the configuration for control transfers when the data stage is in the IN direction. (a)
The host starts the control transfer using the SETUP transaction. (b) The host issues an IN transaction
and performs the data stage. (c) The host issues an OUT transaction and performs the status stage.
Fig. 1-35 Control transfers with data stage in the IN direction
1.4.4.1

Setup stage

The setup stage is performed using the SETUP transaction. For detailed information on the SETUP
transaction, refer to "1.4.3.1 SETUP Transaction."
1.4.4.2

Data Stage/Status Stage

Proceed to the next stage once the setup stage is complete.
If the stage is in the IN direction, set the transaction type (H_CH0Config_1.TID) to "IN," set the
other basic setting registers appropriately and execute the transaction.
If the stage is in the OUT direction, set the transaction type (H_CH0Config_1.TID) to "OUT," set
the other basic setting registers appropriately and execute the transaction.
For the status stage, the IRP data quantity (H_CH0TotalSize_H,L) should be set to "0x0" before
executing the transaction.
S2R72V18 Technical Manual (Rev.1.00)
a b b
Host to Device
Device to Host
EPSON
1. Functions
c
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