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AT90SCR100 데이터시트(PDF) 161 Page - ATMEL Corporation

부품명 AT90SCR100
상세설명  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 데이터시트(HTML) 161 Page - ATMEL Corporation

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TPR0327AY–SMS–30Jan09
AT90SCR100
Register for Endpoint X” on page 167 for further details). These sources are Stall sent, Setup
packet received, Data received, Data sent events.
The AT90SCR100 has two interrupt vectors for both families. These vectors, called USB End-
point and USB Protocol are only valid if the chip operates with the USB interface and are
respectively located at addresses $003E and $0040.
Every source can be enabled/disabled through bits of USBEIM or USBPIM registers.
The figure below shows the implications between the registers, the USB interrupt sources and
the AVR interrupt logic. For further details about the AVR Interrupt Logic please refer to Section
10. “Interrupts” on page 63.
Figure 14-2.
USB Interrupt Hierarchy
14.6
Suspend and Resume Modes
In order to be compliant with the USB specifications V2.0, a device has to support the low-power
consumption state called Suspend and its associated resumption activity called Resume.
The AT90SCR100 enters the Suspend mode only when requested by the host through bus inac-
tivity for at least 3ms.
A USB interrupt is triggered assuming bits SREG.I is set (one) in order to enable
the interrupt.
Note
EP3I
EP2I
EP1I
EP0I
USBPI
USBEI
USBPIM
USBEIM
LOGICAL OR
AVR INTERRUPT LOGIC
USB PROTOCOL
USB ENDPOINT
FEURI
FEURIM
SOFI
SOFIM
RMWUI
RMWUIM
RESI
RESIM
SUSI
SUSIM
EP3IM
EP2IM
EP1IM
EP0IM
UCSE3
UCSE3
UCSE1
UCSE3
UCSE0
UCSE2
ENDPOINT INTERRUPT
PROTOCOL INTERRUPT
UCSE4
UCSE5
UCSE6
UCSE7
EP4I
EP5I
EP6I
EP7I
EP4IM
EP5IM
EP6IM
EP7IM



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