atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 314

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

25.7
314
SPI Timing Characteristics
ATmega32/64/M1/C1
See
Table 4. SPI Timing Parameters
Note:
Figure 25-3. 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 25-3
In SPI Programming mode the minimum SCK high/low period is:
- 2 t
- 3 t
(Data Output)
(Data Input)
(CPOL = 0)
(CPOL = 1)
CLCL
CLCL
SS high to tri-state
SCK to out high
SCK high/low
SCK to SS high
SS low to SCK
Rise/Fall time
Rise/Fall time
SCK high/low
SS low to out
Description
SCK period
SCK period
MISO
MOSI
Out to SCK
SCK to out
SCK to out
for f
for f
SCK
SCK
and
SS
Setup
Setup
Hold
Hold
CK
CK
Figure 25-4
< 12 MHz
>12 MHz
(1)
6
4
MSB
5
for details.
MSB
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
...
See
50% duty cycle
0.5 • t
Table 15-4
Typ.
3.6
10
10
10
10
15
15
10
2
sck
LSB
1
LSB
2
Max.
7647A–AVR–02/08
1600
3
8
ns