μ
PD720231
3. Endpoint Configuration
R19UH0094EJ0100 Rev 1.00
Page 8 of 30
Mar 1, 2013
3.
Endpoint Configuration
The
μ
PD720231 is capable of working in either USB Mass Storage Class Bulk Only Transport
protocol (BOT) or UAS protocol (UASP) both in SS/HS mode. Configuration Interface, Alternate Setting
for each speed mode is shown in table below.
If UASP driver is not supported in the system,
μ
PD720231 works as BOT device.
Table 3-1. Configuration Interface, Alternate Setting for each speed mode
Speed mode
Configuration Interface Alternate
Setting
Endpoint Protocol
0 1:
Bulk-OUT
2: Bulk-IN
BOT
Super-speed 1
0
1
1: Bulk-OUT (Stream)
2: Bulk-IN (Stream)
3: Bulk-OUT
4: Bulk-IN (Stream)
UASP
0 1:
Bulk-OUT
2: Bulk-IN
BOT
High-speed 1 0
1
1: Bulk-OUT (Stream)
2: Bulk-IN (Stream)
3: Bulk-OUT
4: Bulk-IN (Stream)
UASP
Full-speed 1 0
0
1:
Bulk-OUT
2: Bulk-IN
BOT
3.1
Super-speed UASP Mode
Configuration for Super-speed UASP mode is show in
Table 3-2
.
Table 3-2. Configuration for Super-speed UASP mode
EP No.
Direction
Transfer
type
Max Packet
Size
Max Burst
Size
Stream
0 IN/OUT
Control 512
bytes
1
−
1 OUT Bulk
1024
bytes 16
Available
2 IN Bulk
1024
bytes 16 Available
3
OUT
Bulk
1024 bytes
1
Not available
4 IN Bulk
1024
bytes 1 Available
