AR0141CS datasheet(43/64 Pages) ONSEMI

43 / 64 page

AR0141CS/D Rev. 6, 4/16 EN

©Semiconductor Components Industries, LLC, 2016.

AR0141CS: 1/4-Inch Digital Image Sensor

Two-Wire Serial Register Interface

Sequential READ, Start from Random Location

This sequence (Figure 36) starts in the same way as the single READ from random loca-

tion (Figure 34). Instead of generating a no-acknowledge bit after the first byte of data

has been transferred, the master generates an acknowledge bit and continues to

perform byte READs until “L” bytes have been read.

Figure 36:

Sequential READ, Start from Random Location

Sequential READ, Start from Current Location

This sequence (Figure 37) starts in the same way as the single READ from current loca-

tion (Figure 35). Instead of generating a no-acknowledge bit after the first byte of data

has been transferred, the master generates an acknowledge bit and continues to

perform byte READs until “L” bytes have been read.

Figure 37:

Sequential READ, Start from Current Location

Single WRITE to Random Location

This sequence (Figure 38) begins with the master generating a start condition. The slave

address/data direction byte signals a WRITE and is followed by the HIGH then LOW

bytes of the register address that is to be written. The master follows this with the byte of

write data. The WRITE is terminated by the master generating a stop condition.

Figure 38:

Single WRITE to Random Location

Slave Address

A Reg Address[15:8]

Read Data

Reg Address[7:0] A

Read Data

Slave Address

Previous Reg Address, N

Reg Address, M

M+1

M+2

M+1

M+3

Read Data

M+L-2

M+L-1

M+L

A P

Read Data

Previous Reg Address, N

N+1

N+2

N+L-1

N+L

Read Data

Slave Address

Read Data

A P

Slave Address

A Reg Address[15:8]

Reg Address[7:0]

Previous Reg Address, N

Reg Address, M

M+1

Write Data

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