EZ-Link (AN2720SC)
USB C
ONFIGURATION
The AN2720 supports a single configuration, with one interface consisting of the five alternate
settings shown in Table 1.
Table 1. AN2720 endpoints and interface alternate settings
Endpoints
ep0 (8 Bytes)
ep1in (8 Bytes)
ep2in (64 Bytes)
ep2out (64 Bytes)
ep3in (64 Bytes)
ep3out (64 Bytes)
Setting 0
Control
X
Bulk
Bulk
X
X
Setting 1
Test
Mode
Setting 2
Control
intrpt (1mS)
Bulk
Bulk
Bulk
Bulk
Setting 3
Test
Mode
Setting 4
Test
Mode
Alternate setting 0 is intended to consume no fixed USB bandwidth, ensuring that the AN2720
will always be enumerated on the USB bus. Alternate setting 2 uses the USB bandwidth more
efficiently, employing an interrupt endpoint for status notification.
Alternate settings 1, 3 and 4 are diagnostic modes reserved by Cypress. Do not use these modes.
AN2720 Data Sheet Version 1.0
06/07/00
Page 6
CYPRESS [ CYPRESS SEMICONDUCTOR ]
