A000003 Arduino, A000003 Datasheet - Page 308

• Manufacturer Part Number: A000003
• Description: MCU, MPU & DSP Development Tools MINI
• Manufacturer: Arduino
• Series: -r
• Type: MCUr

Specifications of A000003

• Processor To Be Evaluated: Atmega328
• Processor Series: ATmega
• Data Bus Width: 8 bit
• Interface Type: USB, RS-232
• Operating Supply Voltage: 7 V to 9 V
• Contents: Board
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: ATmega168

28.7
308
3. C
4. f
5. This requirement applies to all ATmega48/88/168 2-wire Serial Interface operation. Other devices connected to the 2-wire
SPI Timing Characteristics
ATmega48/88/168
Serial Bus need only obey the general f
CK
b
= capacitance of one bus line in pF.
= CPU clock frequency
Figure 28-4. 2-wire Serial Bus Timing
See
Table 28-6.
Note:
SCL
SDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Figure 28-5
t
SU;STA
Description
SCK period
SCK high/low
Rise/Fall time
Setup
Hold
Out to SCK
SCK to out
SCK to out high
SS low to out
SCK period
SCK high/low
Rise/Fall time
Setup
Hold
SCK to out
SCK to SS high
SS high to tri-state
SS low to SCK
1. In SPI Programming mode the minimum SCK high/low period is:
- 2 t
- 3 t
SPI Timing Parameters
CLCL
CLCL
and
for f
for f
(1)
SCL
Figure 28-6
CK
CK
requirement.
t
HD;STA
< 12 MHz
> 12 MHz
t
t
of
LOW
Master
Master
Master
Master
Master
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Mode
Master
Slave
Slave
for details.
t
HIGH
t
HD;DAT
Min
4 • t
2 • t
10
t
20
20
ck
ck
ck
t
LOW
t
SU;DAT
Typ
See
50% duty cycle
3.6
10
10
0.5 • t
10
10
15
15
10
Table 18-5
sck
Max
1600
t
SU;STO
t
r
2545S–AVR–07/10
t
BUF
ns