MCM20027 Datasheet, PDF (28/73 Pages) Motorola, Inc – Color SXGA Digital Image Sensor 1280 x 1024 pixel progressive scan solid state image sensor

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
ImageMOS
10.9 Register Write
Writing the MCM20027 registers is accomplished with
the following I2C transactions (see Figure 17):
• Master transmits a START
• Master transmits the MCM20027 Slave Calling Ad-
dress with “WRITE” indicated (BYTE=66_h, 102_d,
01100110_b)
• MCM20027 slave sends acknowledgment by forc-
ing the SDATA Low during the 9th clock, if the Call-
ing Address was received
• Master transmits the MCM20027 Register Address
• MCM20027 slave sends acknowledgment by forc-
ing the SDATA Low during the 9th clock after re-
ceiving the Register Address
• Master transmits the data to be written into the reg-
ister at the previously received Register Address
• MCM20027 slave sends acknowledgment by forc-
ing the SDATA Low during the 9th clock after re-
ceiving the data to be written into the Register
Address
• Master transmits STOP to end the write cycle
ously received from the master; MCM20027 transi-
tions to slave-receiver
• Master does not send an acknowledgment (NAK)
• Master transmits STOP to end the read cycle
10.10 Register Read
Reading the MCM20027 registers is accomplished with
the following I2C transactions (see Figure 18):
• Master transmits a START
• Master transmits the MCM20027 Slave Calling Ad-
dress with “WRITE” indicated (BYTE=66_h, 102_d,
01100110_b)
• MCM20027 slave sends acknowledgment by forc-
ing the SData Low during the 9th clock, if the Calling
Address was received
• Master transmits the MCM20027 Register Address
• MCM20027 slave sends acknowledgment by forc-
ing the SData Low during the 9th clock after receiv-
ing the Register Address
• Master transmits a Repeated START
• Master transmits the MCM20027 Slave Calling Ad-
dress with “READ” indicated (BYTE = 67_h, 103_d,
01100111_b)
• MCM20027 slave sends acknowledgment by forc-
ing the SDATA Low during the 9th clock, if the Call-
ing Address was received
• At this point, the MCM20027 transitions from a
“Slave-Receiver” to a “Slave-Transmitter”
• MCM20027 sends the SCLK and the Register Data
contained in the Register Address that was previ-
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Revision 8.0 - 28 November 2001 : MCM20027
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