With One Human Interface Device Connected - Epson S2R72V18 Technical Manual

1. Functions
1.4.1.4.3

With One Human Interface Device Connected

Fig. 1-23 shows a typical channel usage arrangement with a USB Human Interface Device
Class device (e.g., mouse) connected. Devices supporting this class use control and interrupt
IN transfers.
CH0 is used for control transfers.
A general channel (e.g., CHd) is assigned individually for interrupt IN transfers.
The hardware executes transactions by scheduling transfers to and from the channels (refer to
"1.4.2 Scheduling").
Fig. 1-23 Channel usage example (with one human interface device connected)
52
Host
F/W
IRP
HID1
Ctl
HID1
IntIn
EPSON
Host Controller
(Channel Resister)
H/W
CH0
(for Ctl only)
CHa
(for Bulk 1)
CHb
(for Bulk/Int/Iso 1)
CHc
(for Bulk/Int/Iso 2)
CHd
(for Bulk/Int/Iso 3)
CHe
(for Bulk/Int/Iso 4)
S2R72V18 Technical Manual (Rev.1.00)
Device
HID1
Ctl
BulkIn
Bulkout
IntIn