AT90PWM2B-16SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

AT90PWM2/3/2B/3B

26.6 SPI Timing Characteristics

See Figure 26-3 and Figure 26-4 for details.

Table 26-4. SPI Timing Parameters

Description

Mode

1

SCK period

Master

2

SCK high/low

Master

3

Rise/Fall time

Master

4

Setup

Master

5

Hold

Master

6

Out to SCK

Master

7

SCK to out

Master

8

SCK to out high

Master

9

SS low to out

Slave

10

SCK period

11

SCK high/low (1)

Slave

Slave

12

Rise/Fall time

Slave

13

Setup

Slave

14

Hold

Slave

15

SCK to out

Slave

16

SCK to SS high

Slave

17

SS high to tri-state

Slave

18

SS low to SCK

Slave

Min.

4 • tck

2 • tck

10

tck

20

2 • tck

Typ.

See Table 17-4

50% duty cycle

3.6

10

10

0.5 • tsck

10

10

15

15

10

Note:

In SPI Programming mode the minimum SCK high/low period is:

- 2 tCLCL for fCK < 12 MHz

- 3 tCLCL for fCK >12 MHz

Figure 26-3. SPI Interface Timing Requirements (Master Mode)

Max.

ns

1.6

SS

SCK

(CPOL = 0)

SCK

(CPOL = 1)

MISO

(Data Input)

MOSI

(Data Output)

6

45

MSB

...

7

MSB

...

1

2

2

LSB

LSB

3

8

4317K–AVR–03/2013

305

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