AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 62
AT83EC5123
Manufacturer Part Number
AT83EC5123
Description
(AT8xx512x) Smart Card Reader ICs
Manufacturer
ATMEL Corporation
Datasheet
1.AT83EC5123.pdf
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AT8xC5122/23
Before using an endpoint, this one should be enabled by setting the EPEN bit in the
UEPCONX register.
An endpoint which is not enabled won’t answer to any USB request. The Default Control
Endpoint (Endpoint 0) should always be enabled in order to answer to USB standard
requests.
•
All Standard Endpoints can be configured in Control, Bulk, Interrupt or Isochronous
mode. The Ping-pong Endpoints can be configured in Bulk, Interrupt or Isochronous
mode. The configuration of an endpoint is performed by setting the field EPTYPE with
the following values:
The Endpoint 0 is the Default Control Endpoint and should always be configured in Con-
trol type.
•
For Bulk, Interrupt and Isochronous endpoints, the direction is defined with the EPDIR
bit of the UEPCONX register with the following values:
For Control endpoints, the EPDIR bit has no effect.
•
Make sure to select the correct endpoint number in the UEPNUM register before
accessing to endpoint specific registers.
Table 57. Summary of Endpoint Configuration
Endpoint configuration
Disabled
Control
Bulk-In
Bulk-Out
Interrupt-In
Interrupt-Out
Isochronous-In
Isochronous-Out
Endpoint type configuration
–
–
–
–
Endpoint direction configuration
–
–
Summary of Endpoint Configuration:
Control:
Isochronous: EPTYPE = 01b
Bulk:
Interrupt:
IN:EPDIR = 1b
OUT:EPDIR = 0b
EPTYPE = 00b
EPTYPE = 10b
EPTYPE = 11b
EPEN
0b
1b
1b
1b
1b
1b
1b
1b
EPDIR
Xb
Xb
1b
0b
1b
0b
1b
0b
EPTYPE
XXb
00b
10b
10b
11b
11b
01b
01b
4202B–SCR–07/03
0XXX XXXb
UEPCONX
80h
86h
82h
87h
83h
85h
81h
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