ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

SPI Timing

Characteristics

ATmega64(L)

Table 135. SPI Timing Parameters

Description

Mode

Min

Typ

Max

1

SCK period

Master

See Table 72

2

SCK high/low

Master

50% duty cycle

3

Rise/Fall time

Master

TBD

4

Setup

Master

10

5

Hold

Master

10

6

Out to SCK

Master

7

SCK to out

Master

0.5 • tsck

10

8

SCK to out high

Master

10

9

SS low to out

Slave

15

ns

10

SCK period

Slave

4 • tck

11

SCK high/low(1)

Slave

2 • tck

12

Rise/Fall time

Slave

TBD

13

Setup

Slave

10

14

Hold

Slave

tck

15

SCK to out

Slave

15

16

SCK to SS high

Slave

20

17

SS high to tri-state

Slave

10

18

SS low to SCK

Slave

20

Note:

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

- 2 tCLCL for fCK < 12 MHz

- 3 tCLCL for fCK >12 MHz

Figure 157. SPI Interface Timing Requirements (Master Mode)

SS

6

1

SCK

(CPOL = 0)

2

2

SCK

(CPOL = 1)

45

3

MISO

(Data Input)

MSB

...

7

LSB

8

MOSI

(Data Output)

MSB

...

LSB

2490G–AVR–03/04

331

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