MT9J003_16 Datasheet, PDF (25/77 Pages) ON Semiconductor – 1/2.3-Inch 10 Mp CMOS Digital Image Sensor

MT9J003: 1/2.3-Inch 10 Mp CMOS Digital Image Sensor
Two-Wire Serial Register Interface
Single READ From Random Location
This sequence (Figure 16) 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 16 shows how the internal register address
maintained by the MT9J003 is loaded and incremented as the sequence proceeds.
Figure 16: Single READ From Random Location
Previous Reg Address, N
Reg Address, M
M+1
S Slave Address 0 A Reg Address[15:8] A Reg Address[7:0] A Sr Slave Address 1 A
Read Data
AP
S = start condition
P = stop condition
Sr = restart condition
A = acknowledge
A = no-acknowledge
slave to master
master to slave
Single READ From Current Location
This sequence (Figure 17) performs a read using the current value of the MT9J003
internal register address. The master terminates the READ by generating a no-acknowl-
edge bit followed by a stop condition. The figure shows two independent READ
sequences.
Figure 17: Single READ From Current Location
Previous Reg Address, N
S Slave Address 1 A Read Data
AP
Reg Address, N+1
N+2
S Slave Address 1 A Read Data A P
MT9J003-DS Rev. E 5/15 EN
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