ch7004c Chrontel, ch7004c Datasheet - Page 27

• Manufacturer Part Number: ch7004c
• Description: Digital Pc To Tv Encoder With Macrovisiontm
• Manufacturer: Chrontel

CHRONTEL
.
If AutoInc = 1, then the address register will be incremented automatically and subsequent data bytes can be read
from successive registers, without providing a second RAB
When the auto-increment mode is enabled (AutoInc is set to 1), the Address Register will continue incrementing for
each read cycle. When the content of the Address Register reaches 2A, it will wrap around and start from 00h again.
The auto increment sequence can be terminated by either a “STOP” or “RESTART” condition. The read operation
can be terminated with a “STOP” condition.Figure 25 shows an auto-increment read cycle terminated by a STOP
or RESTART condition.
201-0000-024 Rev. 2.4, 6/24/2004
SC
SD
SD
SC
Condition
Start
Condition
Start
Device ID
Device ID
1 - 7
Device ID
1 - 7
1 - 7
Serial Port
R/W*=0
R/W*
Serial Port
8
acknowledge
R/W*
R/W*=0
Serial Port
R/W*
CH7004
R/W*=0
8
8
acknowledge
acknowledge
ACK
CH7004
9
CH7004
ACK
ACK
9
Figure 25: Auto-increment Read Cycle
9
RAB n
1 - 8
Figure 24: Alternating Read Cycle
RAB 2
acknowledge
1 - 8
RAB 1
1 - 8
CH7004
ACK
acknowledge
9
acknowledge
CH7004
CH7004
ACK
Condition
ACK
9
Restart
9
10
Condition
Condition
Restart
Restart
Device ID
10
10
1 - 7
Device ID
Device ID
Serial Port
1 - 7
R/W*
R/W*=1
1 - 7
8
acknowledge
CH7004
Serial Port
ACK
R/W*=1
R/W*
Serial Port
9
R/W*
R/W*=1
8
8
acknowledge
acknowledge
Data n
CH7004
1 - 8
ACK
CH7004
ACK
9
9
acknowledge
Master
ACK
Data 2
9
1 - 8
Data 1
1 - 8
Master does
not acknowledge
Data n+1
1 - 8
Master does
not acknowledge
just before Stop
condition
acknowledge
ACK
does not
ACK
9
Master
9
CH7004C
ACK
Condition
9
Condition
Restart
Stop
10
Condition
Stop
27