AS3709 datasheet(38/74 Pages) AMSCO

38 / 74 page

AS3709 – 38

ams Datasheet, Confidential: 2013-Aug [1-02]

Det a il e d De sc r i pt ion - S y s t em F u nc t i on s

of the word-address counter). To terminate the transmission the

master has to send a not-acknowledge following the last data

byte and generate the STOP condition subsequently.

Figure 50:

I²C Current Address Read

To keep the access time as small as possible, this format allows

a read access without the word address transfer in advance to

the data transfer. The bus is idle and the master issues a START

condition followed by the Device-Read address. Analogous to

Random Read, a single byte transfer is terminated with a

not-acknowledge after the 1st register byte. Analogous to

Sequential Read an unlimited number of data bytes can be

transferred, where the data bytes has to be responded with an

acknowledge from the master. For termination of the

transmission the master sends a not-acknowledge following

the last data byte and a subsequent STOP condition.

I²C Parameter

Figure 51:

I²C SDA/SCL Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

VIL

SCL,SDA Low Level input voltage

0.4

VIH

SCL,SDA High Level input voltage

1.4

data

reg_data 2

...

reg_data n

N P

SDR

read register

WA++

read register

WA++

read register

WA++

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