AS3701 datasheet(57/110 Pages) AMSOSRAM

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[v1-11] 2016-Dec-14

AS3701 − Detailed Description – System Functions

Figure 63:

I²C Sequential Read

Sequential Read is the extended form of Random Read, as more

than one register-data bytes are transferred subsequently. In

difference to the Random Read, for a sequential read the

transferred register-data bytes are responded by an

acknowledge from the master. The number of data bytes

transferred in one sequence is unlimited (consider the behavior

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 64:

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 65:

I²C Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VIL

SCL,SDA Low Level input voltage

0.4

VIH

SCL,SDA High Level input voltage

1.6

data

reg_data 2

...

reg_data n

AA Sr

N P

SDW

read register

WA++

read register

WA++

read register

WA++

data

reg_data 2

...

reg_data n

N P

SDR

read register

WA++

read register

WA++

read register

WA++

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