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AS3935

Datasheet - Detailed Descri p ti on

8.5.1 I²C Byte Write

The transmission begins with a START condition (S), which consists of a high-to-low transition of the I2CD bus when I2CL is high. The START

condition is followed by the Device Write mode (DW), word address (WA: register address to write into) and the register data (reg_dat). Until the

stop condition (P) the word address is automatically incremented at any register data.

Figure 17. I²C Byte Write

Figure 18. I²C Page Write

Symbol

Description

S

START condition after STOP

Sr

Repeated START

DW

Device Address for write

DR

Device Address for read

WA

Word address

A

Acknowledge

N

No acknowledge

P

STOP condition

WA++

Internal address increment

S

DW

A

WA

A

reg_data

P

A

Slave (AS3935) as receiver

Slave (AS3935) as transmitter

S

DW

A

WA

A

reg_data 1

P

A

reg_data

A

reg_data

A

reg_data 2

A

….

A

reg_data n

AA

A

WA++

WA++

WA++

Slave (AS3935) as receiver

Slave (AS3935) as transmitter