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AT90USB646 Datasheet(PDF) 404 Page - ATMEL Corporation

Part # AT90USB646
Description  8-bit Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
PDF  459 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB646 Datasheet(HTML) 404 Page - ATMEL Corporation

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7593H–AVR–11/08
ATmega32U6/AT90USB64/128
Figure 30-5. SPI Interface Timing Requirements (Slave Mode)
30.8
Hardware Boot EntranceTiming Characteristics
Figure 30-6. Hardware Boot Timing Requirements
MISO
(Data Output)
SCK
(CPOL = 1)
MOSI
(Data Input)
SCK
(CPOL = 0)
SS
MSB
LSB
LSB
MSB
...
...
10
11
11
12
13
14
17
15
9
X
16
Table 30-4.
Hardware Boot Timings
Symbol
Parameter
Min
Max
tSHRH
HWB low Setup before Reset High
0
tHHRH
HWB low Hold after Reset High
StartUpTime(S
UT) + Time
Out
Delay(TOUT)
RESET
ALE/HWB
t
SHRH
t
HHRH



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