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AT90SCR100 Datasheet(PDF) 167 Page - ATMEL Corporation

Part # AT90SCR100
Description  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 Datasheet(HTML) 167 Page - ATMEL Corporation

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167
TPR0327AY–SMS–30Jan09
AT90SCR100
This bit is cleared (zero) by hardware when the endpoint interrupt source has been cleared
(zero) by the software (see “USBCSEX - USB Control And Status Register for Endpoint X” on
page 167).
14.8.5
USBEIM - USB Endpoint Interrupt Mask Register
See “USBEI - USB Endpoint Interrupt Register” on page 166.
• Bit n - EPnIM : Endpoint n Interrupt Mask Bit (n=0..7)
When EPnIM is set (one) the Endpoint n interrupt is enabled.
When EPnIM is cleared (zero) the Endpoint n interrupt is masked.
14.8.6
USBENUM - USB Endpoint Number Register
• Bit 7..3 - Res : Reserved Bits
These bits are reserved and are always read as zero.
• Bit 2..0 - ENUM2..0 : Endpoint Number
Use this register to select an endpoint. The USB Device registers ended by a X correspond then
to this number.
14.8.7
USBCSEX - USB Control And Status Register for Endpoint X
Set USBENUM register to point to the relevant Endpoint before using the USBCEX register.
The endpoint interrupt conditions are listed below and further detailed in “USBC-
SEX - USB Control And Status Register for Endpoint X” on page 167. They are the
same for the seven endpoints ( 0
≤ n ≤ 7):
• USBCSEn.TXC bit is set in Bulk In, Interrupt In or Control mode.
• USBCSEn.RCVD bit is set in Bulk Out, Interrupt Out, Isochronous Out or
Control mode.
• USBCSEn.RXSETUP is set in Control mode.
• USBCSEn.STSENT bit is set in Bulk, Interrupt or Control mode.
Note
Bit
7654
3
2
1
0
$0000E5
EP7IM
EP6IM
EP5IM
EP4IM
EP3IM
EP2IM
EP1IM
EP0IM
USBEIM
Read/write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value
0000
0
0
0
0
0x00
Bit
7
6543
2
1
0
$0000CA
-----
ENUM [2..0]
USBENUM
Read/write
R
R
R
R
R
R/W
R/W
R/W
Initial value
0
0
0
0
0
0
0
0
0x00
Bit
7654
3
2
1
0
$0000CB
-
IERR
FSTALL
TXPB
STSENT RXSETUP
RCVD
TXC
USBCSEX
Read/write
R
R
R/W
R/W
R/W
R/W
R/W
R/W
Initial value
0000
0
0
0
0
0x00



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