CHRONTEL

CH7002D

201-0000-029 Rev 6.1, 8/2/99

21

followed by a DAB, must be produced by the master before each of the RAB, and before each of the data read

events. Two consecutive alternating read cycles are shown in Figure 22.

Figure 22: Alternate Read Mode

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.

Figure 23: Auto-increment Read Mode

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 0Bh, 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 23 shows an auto-increment read cycle terminated by

a STOP or RESTART condition.

SD

SC

1 - 8

RAB 1

9

10

ACK

Restart

Condition

Start

Condition

Stop

Condition

Master does

not acknowledge

1 - 7

Device

8

R/W*

9

ACK

CH7002

acknowledge

CH7002

acknowledge

1 - 8

Data 1

9

ACK

1 - 7

Device

8

R/W*

9

ACK

CH7002

acknowedge

10

Restart

Condition

1 - 8

RAB 2

9

10

ACK

Restart

Condition

1 - 7

Device

ID

8

R/W*

9

ACK

CH7002

acknowledge

CH7002

1 - 8

Data 2

9

ACK

1 - 7

Device

ID

8

R/W*

9

ACK

CH7002

acknowledge

Master

does not

acknowledge

acknowledge

Master

acknowledge

SD

SC

1 - 8

RAB n

9

10

ACK

Restart

Condition

Start

Condition

Stop

Condition

Master does

not acknowledge

just before Stop

condition

1 - 7

Device

8

R/W*

9

ACK

CH7002

acknowledge

CH7002

1 - 8

Data n

9

ACK

1 - 7

Device

8

R/W*

9

ACK

CH7002

acknowledge

1 - 8

Data

n+1

9

ACK