AR0330 datasheet(62/77 Pages) ONSEMI

62 / 77 page

AR0330_DS Rev. U Pub. 4/15 EN

©Semiconductor Components Industries, LLC,2015.

AR0330: 1/3-Inch CMOS Digital Image Sensor

Two-Wire Serial Register Interface

Single READ From Random Location

This sequence (Figure 42) starts with a dummy WRITE to the 16-bit address that is to be

used for the READ. The master terminates the WRITE by generating a restart condition.

The master then sends the 8-bit read slave address/data direction byte and clocks out

one byte of register data. The master terminates the READ by generating a no-acknowl-

edge bit followed by a stop condition. Figure 42 shows how the internal register address

maintained by the AR0330 is loaded and incremented as the sequence proceeds.

Figure 42:

Single READ From Random Location

Single READ From Current Location

This sequence (Figure 43) performs a read using the current value of the AR0330 internal

followed by a stop condition. The figure shows two independent READ sequences.

Figure 43:

Single READ From Current Location

S = start condition

P = stop condition

Sr = restart condition

A = acknowledge

A = no-acknowledge

slave to master

master to slave

Slave Address

A Reg Address[15:8]

Reg Address[7:0]

Slave Address

Read Data

Previous Reg Address, N

Reg Address, M

M+1

Slave Address

Read Data

Slave Address

Read Data

Previous Reg Address, N

Reg Address, N+1

N+2

AR0330 Datasheet(PDF) 62 Page - ON Semiconductor