atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 403

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

30.8
7766A–AVR–03/08
Hardware Boot EntranceTiming Characteristics
Figure 30-5. SPI Interface Timing Requirements (Slave Mode)
Figure 30-6. Hardware Boot Timing Requirements
Table 30-4.
Symbol
tSHRH
tHHRH
(Data Output)
(Data Input)
(CPOL = 0)
(CPOL = 1)
MOSI
MISO
Parameter
HWB low Setup before Reset High
HWB low Hold after Reset High
SCK
SCK
SS
ALE/HWB
Hardware Boot Timings
RESET
9
13
MSB
MSB
14
15
t
SHRH
...
...
StartUpTime(S
Delay(TOUT)
UT) + Time
Min
Out
0
11
10
t
HHRH
LSB
ATmega32U4
LSB
11
Max
12
16
X
17
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