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ATmega328P Datasheet(PDF) 319 Page - ATMEL Corporation

Part # ATmega328P
Description  8-bit Microcontroller with 4/8/16/32K Bytes In-System Programmable Flash
PDF  448 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega328P Datasheet(HTML) 319 Page - ATMEL Corporation

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319
8161D–AVR–10/09
ATmega48PA/88PA/168PA/328P
28.6
SPI Timing Characteristics
See Figure 28-3 and Figure 28-4 for details.
Note:
1. In SPI Programming mode the minimum SCK high/low period is:
- 2 tCLCL for fCK < 12 MHz
- 3 t
CLCL for fCK > 12 MHz
2. All DC Characteristics contained in this datasheet are based on simulation and characteriza-
tion of other AVR microcontrollers manufactured in the same process technology. These
values are preliminary values representing design targets, and will be updated after character-
ization of actual silicon.
Table 28-5.
SPI Timing Parameters
Description
Mode
Min
Typ
Max
1
SCK period
Master
See Table 18-5
ns
2
SCK high/low
Master
50% duty cycle
3
Rise/Fall time
Master
3.6
4
Setup
Master
10
5Hold
Master
10
6
Out to SCK
Master
0.5 • tsck
7
SCK to out
Master
10
8
SCK to out high
Master
10
9SS low to out
Slave
15
10
SCK period
Slave
4 • tck
11
SCK high/low(1)
Slave
2 • tck
12
Rise/Fall time
Slave
1600
13
Setup
Slave
10
14
Hold
Slave
tck
15
SCK to out
Slave
15
16
SCK to SS high
Slave
20
17
SS high to tri-state
Slave
10
18
SS low to SCK
Slave
20



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