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AT43USB326 bảng dữ liệu(PDF) 18 Page - ATMEL Corporation

tên linh kiện AT43USB326
Giải thích chi tiết về linh kiện  Multimedia USB Keyboard Controller with Embedded Hub
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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AT43USB326 bảng dữ liệu(HTML) 18 Page - ATMEL Corporation

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AT43USB326
3313D–USB–04/06
Figure 4. Oscillator and PLL
Reset and
Interrupt Handling
The AT43USB326 provides 12 different interrupt sources with 4 separate reset vectors, each
with a separate program vector in the program memory space. Nine of the interrupt sources
share 2 interrupt reset vectors. These nine are the USB related interrupts. All interrupts are
assigned individual enable bits which must be set (one) together with the I-bit in the status reg-
ister in order to enable the interrupt.
The lowest addresses in the program memory space are automatically defined as the Reset
and Interrupt vectors. The complete list of vectors is shown in Table 6. The list also determines
the priority levels of the different interrupts. The lower the address, the higher is the priority
level. RESET has the highest priority, and next is INT0 – the USB Suspend and Resume Inter-
rupt, etc.
AT43USB326
XTAL1
XTAL2
LFT
Y1
6.000 MHz
U1
C2
0.01 UF
C1
0.22 UF
R1
100
Table 6. Reset and Interrupt Vectors
Vector No.
Program Address
Source
Interrupt Definition
1
$000
RESET
External Reset, Power-on Reset and
Watchdog Reset
2
$002
INT0
USB Suspend and Resume
8
$00E
TIMER0, OVF
Timer/Counter0 Overflow
13
$018
USB HW
USB Hardware



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