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參數資料
| 型號： | MCM20014IBB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | 1/3” Color VGA Digital Image Sensor |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, CQCC48 |
| 封裝： | CERAMIC, LCC-48 |
| 文件頁數： | 44/54頁 |
| 文件大小： | 761K |
| 代理商： | MCM20014IBB |
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MOTOROLA
MCM20014
44
6.10 Register Read
Reading the MCM20014 registers is accomplished with
the following I2C transactions (see
Figure 26
):
Master transmits a START
Master transmits the MCM20014 Slave Calling Ad-
dress with
“
WRITE
”
indicated (BYTE=66
h
, 102
d
,
01100110
b
)
MCM20014 slave sends acknowledgment by forc-
ing the SData Low during the 9th clock, if the Calling
Address was received
Master transmits the MCM20014 Register Address
MCM20014 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 MCM20014 Slave Calling Ad-
dress with
“
READ
”
indicated (BYTE = 67
h,
103
d
,
01100111
b
)
MCM20014 slave sends acknowledgment by forc-
ing the SDATA Low during the 9th clock, if the Call-
ing Address was received
At this point, the MCM20014 transitions from a
“
Slave-Receiver
”
to a
“
Slave-Transmitter
”
MCM20014 sends the SCLK and the Register Data
contained in the Register Address that was previ-
ously received from the master; MCM20014 transi-
tions to slave-receiver
Master does not send an acknowledgment (NAK)
Master transmits STOP to end the read cycle
Figure 26. READ Cycle using I2C Bus
SCLK
SDATA
Start
Signal
Ack
Bit
from
1
2
3
4
5
6
7
8
MSB
LSB
1
2
3
4
5
6
7
8
MSB
LSB
9
9
AD7 AD6 AD5 AD4 AD3 AD2 AD1
“
0
”
“
1
”
“
0
”
“
1
”
D7
D6 D5
D4 D3 D2 D1 D0
MCM20014 I
2
C Bus Address
MCM20014 Register Address
Write
MCM20014
Ack
Bit
from
MCM20014
XX
Repeated
Start
Signal
1
2
3
4
5
6
7
8
MSB
LSB
9
Read
SCLK
SDATA
1
2
3
4
5
6
7
8
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
9
Data from MCM20014 Register
No Ack. Bit from MASTER terminates the transfer
Stop
Signal from MASTER
Single Byte Transfer to Master
MCM20014 I
2
C Bus Address
SCLK
SDATA
“
0
”
“
1
”
“
1
”
AD7 AD6 AD5 AD4 AD3 AD2 AD1
“
0
”
“
1
”
“
0
”
“
1
”
“
0
”
“
1
”
“
1
”
Ack Bit fromMCM20014
At this point the MCM20014
transitions from a
“
SLAVE-receiver
”
to a
“
SLAVE- transmitter
”
The MCM20014
transitions from a
“
SLAVE-transmitter
”
to a
“
SLAVE-receiver
”
after the
register data is sent
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