AS3412 datasheet(49/85 Pages) AMSOSRAM

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[v1-00] 2016-Apr-06

AS3412 − Detailed Description

Figure 62:

Byte Write

Byte Write: This figure shows the sequence for a byte write command.

Figure 63:

Page Write

Page Write: This figure shows the sequence for a page write command.

Byte Write and Page Write formats are used to write data to the

slave. The transmission begins with the START condition, which

is generated by the master when the bus is in IDLE state (the

bus is free). The device-write address is followed by the word

address. After the word address any number of data bytes can

be sent to the slave. The word address is incremented internally,

in order to write subsequent data bytes to subsequent address

locations.

For reading data from the slave device, the master has to change

the transfer direction. This can be done either with a repeated

START condition followed by the device-read address, or simply

with a new transmission START followed by the device-read

address, when the bus is in IDLE state. The device-read address

is always followed by the 1st register byte transmitted from the

slave. In Read Mode any number of subsequent register bytes

can be read from the slave. The word address is incremented

internally.

Figure 64:

Random Read

Random Read: This figure shows the I²C sequence for a random read function.

reg_data

WA++

reg_data 1

reg_data 2

...

reg_data n

WA++

A Sr

data

RA++

AS3412 Datasheet(PDF) 49 Page - ams-OSRAM AG