ch7009a ETC-unknow, ch7009a Datasheet - Page 22

• Manufacturer Part Number: ch7009a
• Description: Chrontel Ch7009 Dvi / Tv Output Device
• Manufacturer: ETC-unknow

CHRONTEL
Transfer Protocols (continued)
.
For auto-increment reads 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, the Address Register will continue incrementing for each read cycle.
When the content of the Address Register reaches 4Fh, 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 14 shows an auto-increment read cycle terminated by a STOP or
RESTART condition.
22
SC
SD
SD
SC
Condition
Condition
Start
Start
Device ID
Device ID
1 - 7
Device ID
1 - 7
1 - 7
R/W*
8
acknowledge
R/W*
R/W*
CH7009
I
8
2
C
I
acknowledge
8
2
acknowledge
ACK
C
CH7009
9
CH7009
ACK
ACK
9
Figure 14: Auto-increment Read Cycle
9
RAB n
1 - 8
Figure 13: Alternating Read Cycle
RAB 2
acknowledge
1 - 8
RAB 1
1 - 8
CH7009
ACK
acknowledge
9
acknowledge
CH7009
CH7009
ACK
Condition
ACK
9
Restart
9
10
Condition
Condition
Restart
Restart
Device ID
10
10
1 - 7
Device ID
Device ID
1 - 7
R/W*
1 - 7
I
8
2
C
acknowledge
CH7009
ACK
R/W*
9
R/W*
I
8
2
C
I
8
2
acknowledge
C
acknowledge
CH7009
Data n
1 - 8
ACK
CH7009
ACK
9
9
acknowledge
201-0000-035 Rev 1.1, 5/8/2000
Master
ACK
Data 2
1 - 8
9
Data 1
1 - 8
Master does
not acknowledge
Data
1 - 8
n+1
Master does
not acknowledge
just before Stop
condition
acknowledge
ACK
does not
ACK
9
Master
9
CH7009A
ACK
Condition
9
Condition
Restart
Stop
10
Condition
Stop