at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 271

• Manufacturer Part Number: at90pwm81-16se
• Description: 8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
• Manufacturer: ATMEL Corporation

23.6
7734M–AVR–03/10
SPI Timing Characteristics
See
Table 23-4.
Note:
Figure 23-3.
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Figure 23-3
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 high/low
SCK to out high
SCK to SS high
SS low to SCK
SCK high/low
Rise/Fall time
Rise/Fall time
SPI Timing Parameters
SPI Interface Timing Requirements (Master Mode)
SS low to out
and
MISO
MOSI
Description
SCK period
Out to SCK
SCK period
for f
for f
SCK to out
SCK to out
SCK
SCK
SS
Setup
Setup
Hold
Hold
Figure 23-4
CK
CK
< 12 MHz
>12 MHz
(1)
6
4
MSB
for details.
5
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
2 • t
Min.
10
t
20
ck
...
ck
ck
ck
...
50% duty cycle
See
0.5 • t
Table 15-5
Typ.
3.6
10
10
10
10
15
15
10
2
sck
AT90PWM81
LSB
1
LSB
2
Max.
1.6
3
8
ns
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