ATMEGA644PV ATMEL [ATMEL Corporation], ATMEGA644PV Datasheet - Page 330

• Manufacturer Part Number: ATMEGA644PV
• Description: 8-bit Microcontroller with 16/32/64K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

26.6
330
SPI Timing Characteristics
ATmega164P/324P/644P
See
Table 26-8.
Note:
Figure 26-4. SPI Interface Timing Requirements (Master Mode)
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Figure 26-4 on page 330
(Data Output)
(Data Input)
(CPOL = 0)
(CPOL = 1)
1. In SPI Programming mode the minimum SCK high/low period is:
- 2 t
- 3 t
MISO
MOSI
SS high to tri-state
SCK
SCK
SCK to out high
SCK high/low
SCK to SS high
SS
SS low to SCK
SCK high/low
Rise/Fall time
Rise/Fall time
SS low to out
SPI Timing Parameters
Description
CLCL
CLCL
SCK period
SCK period
Out to SCK
SCK to out
SCK to out
Setup
Setup
Hold
Hold
for f
for f
CK
CK
< 12 MHz
> 12 MHz
6
4
(1)
MSB
5
MSB
and
Figure 26-5 on page 331
Master
Master
Master
Master
Master
Master
Master
Master
Mode
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
7
...
4 • t
2 • t
...
Min
10
20
20
t
ck
ck
ck
for details.
See
50% duty cycle
2
0.5 • t
Table 16-5
TBD
TBD
Typ
10
10
10
10
15
15
10
LSB
1
sck
LSB
2
3
Max
8
8011D–AVR–02/07
ns