AS3630 datasheet(43/72 Pages) AMSCO

43 / 72 page

8A Supercap Flash Driver

AS3630 – 43

Figure AS3630 – 39:

Data Read (from Current Pointer Location) - Slave Transmitter Mode

Figure AS3630 – 40:

Data Read (Write Pointer, Then Read) - Slave Receive and Transmit

I²C Address Selection

Note: It is required to read the register Fixed ID twice after

startup in order for the I²C address selection to identify the I²C

address used.

The AS3630 features two I²C slave addresses without having a

dedicated address selection pin. The selection of the I²C address

is done with the interconnection of AS3630 to the bus lines

shown in the figure below. The serial interface logic inside

AS3630 is able to distinguish between a direct I²C connection

to the master or a second option where data and clock line are

crossed. Therefore it is possible to address a maximum of two

AS3630 slaves on one I²C bus.

Figure 42

XXXXXXXX

<Data(n)>

<Data(n+1)>

<Data(n+X)>

S - Start

A - Acknowledge (ACK)

P - Stop

NA - Not Acknowledge (NACK)

Data Transferred

(X + 1 Bytes + Acknowledge)

Note: Last data byte is followed by a NACK

<Data(n+2)>

Figure 42

XXXXXXXX

Figure 42

<Data(n+2)>

S - Start

Sr - Repeated Start

A - Acknowledge (ACK)

P - Stop

NA - Not Acknowledge (NACK)

XXXXXXXX

<Data(n)>

<Data(n+1)>

<Data(n+X)>

Data Transferred

(X + 1 Bytes + Acknowledge)

Note: Last data byte is followed by a NACK

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