AS3435 datasheet(62/102 Pages) AMSCO

62 / 102 page

AS3415/AS3435 – 62

ams Datasheet, Confidential: 2014-Jun-13 [v1-30]

De tail ed De sc rip t ion

In order to change the data direction a repeated START

condition is issued on the 1st SCL pulse after the acknowledge

bit of the word address transfer. After the reception of the

device-read address, the slave becomes the transmitter. In this

state the slave transmits register data located by the previous

received word address vector. The master responds to the data

byte with a not-acknowledge, and issues a STOP condition on

the bus.

Figure 80:

Sequential Read

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

than one register-data bytes are transferred subsequently.

Different from the Random Read, for a sequential read, the

transferred register-data bytes are responded with 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 then generate the STOP condition.

Figure 81:

Current Address Read

read register

WA++

data

reg_data 2

read register

WA++

reg_data n

...

read register

WA++

read register

WA++

data

reg_data 2

read register

WA++

reg_data n

...

read register

WA++

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