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AT90USB646 Datasheet(PDF) 286 Page - ATMEL Corporation

Part # AT90USB646
Description  Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
PDF  434 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB646 Datasheet(HTML) 286 Page - ATMEL Corporation

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286
7593A–AVR–02/06
AT90USB64/128
• 7-6 - EPTYPE1:0 - Endpoint Type Bits
Set this bit according to the endpoint configuration:
00b: Control10b: Bulk
01b: Isochronous11b: Interrupt
•5-4 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 3-2 - Reserved for test purpose
The value read from these bits is always 0.
Do not set these bits.
•1 - Reserved
The value read from this bits is always 0. Do not set this bit.
• 0 - EPDIR - Endpoint Direction Bit
Set to configure an IN direction for bulk, interrupt or isochronous endpoints.
Clear to configure an OUT direction for bulk, interrupt, isochronous or control endpoints.
•7 - Reserved
The value read from these bits is always 0. Do not set these bits.
• 6-4 - EPSIZE2:0 - Endpoint Size Bits
Set this bit according to the endpoint size:
000b: 8 bytes100b: 128 bytes
001b: 16 bytes101b: 256 bytes
010b: 32 bytes110b: 512 bytes
011b: 64 bytes111b: Reserved. Do not use this configuration.
• 3-2 - EPBK1:0 - Endpoint Bank Bits
Set this field according to the endpoint size:
00b: One bank
01b: Double bank
1xb: Reserved. Do not use this configuration.
Bit
7
6
543
21
0
EPTYPE1:0
-
-
-
-
-
EPDIR
UECFG0X
Read/Write
R/W
R/W
R
RRRR
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
-
EPSIZE2:0
EPBK1:0
ALLOC
-
UECFG1X
Read/Write
R
R/W
R/W
R/W
R/W
R/W
R/W
R
Initial Value
0
0
0
0
0
0
0
0



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