ATWINC3400 datasheet(20/35 Pages) ATMEL

Il numero della parte	ATWINC3400

Spiegazioni elettronici	Single Chip IEEE 802.11 b/g/n Network Controller withIntegrated Bluetooth 4.0

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Produttore elettronici	ATMEL [ATMEL Corporation]

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ATWINC3400-Datasheet [PRELIMINARY DATASHEET]

Atmel-42396C-SmartConnect-ATWINC3400_Preliminary-Datasheet_07/2015

2

0

20

Table 9-2.

I2C Slave Timing Parameters

Parameter

Symbol

Min.

Max.

Unit

Remarks

SCL Clock Frequency

fSCL

0

400

kHz

SCL Low Pulse Width

tWL

1.3

µs

SCL High Pulse Width

tWH

0.6

SCL, SDA Fall Time

tHL

300

ns

SCL, SDA Rise Time

tLH

300

This is dictated by external

components

START Setup Time

tSUSTA

0.6

µs

START Hold Time

tHDSTA

0.6

SDA Setup Time

tSUDAT

100

ns

SDA Hold Time

tHDDAT

0

Slave and Master Default

40

Master Programming Option

STOP Setup Time

tSUSTO

0.6

µs

Bus Free Time Between STOP and START

tBUF

1.3

Glitch Pulse Reject

tPR

0

50

ns

9.2

I2C Master Interface

ATWILC3400 provides an I2C bus master, which is intended primarily for accessing an external EEPROM

memory through a software-defined protocol. The I2C Master is a two-wire serial interface consisting of a serial

data line (SDA) and a serial clock line (SCL). SDA can be configured on pin 42 (HOST_WAKEUP), and SCL

can be configured on pin 41 (GPIO21).

The I2C Master interface supports three speeds:



Standard mode (100kb/s)



Fast mode (400kb/s)



High-speed mode (3.4Mb/s)

The timing diagram of the I2C Master interface is the same as that of the I2C Slave interface (see Figure 9-1).

The timing parameters of I2C Master are shown in Table 9-3.

Table 9-3.

I2C Master Timing Parameters

Parameter

Symbol

Standard Mode

Fast Mode

High-Speed

Mode

Unit

Min.

Max.

Min.

Max.

Min.

Max.

SCL Clock Frequency

fSCL

0

100

0

400

0

3400

kHz

SCL Low Pulse Width

tWL

4.7

1.3

0.16

µs

SCL High Pulse Width

tWH

4

0.6

0.06

SCL Fall Time

tHLSCL

300

10

40

ns

SDA Fall Time

tHLSDA

300

10

80

SCL Rise Time

tLHSCL

1000

300

10

40

SDA Rise Time

tLHSDA

1000

300

10

80

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