www.austriamicrosystems.com/LED-Driver-ICs/AS1115

Revision 1.08

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AS1115

Datasheet - D e t a i l e d D e s c r i p t i o n

Command Byte

The AS1115 operation, (see Table 6) is determined by a command byte (see Figure 21 on page 11).

Figure 21. Command Byte

Figure 22. Command and Single Data Byte Received

Figure 23. Setting the Pointer to a Address Register to select a Data Register for a Read Operation

Figure 24. Reading nBytes from AS1115

D15

D14

D13

D12

D11

D10

D09

D08

MSB

6

5

4

3

2

1

LSB

From Master to Slave

From Slave to Master

A

A

P

A

S

Command Byte

Data Byte

Slave Address

D14 D13 D12 D11 D10

D9

D8

D15

D6

D5

D4

D3

D2

D1

D0

D7

Acknowledge

from AS1115

0

0

0

Acknowledge

from AS1115

Acknowledge

from AS1115

R/W

0

AS1115 Registers

Autoincrement

Memory Word

Address

1 Byte

From Master to Slave

From Slave to Master

A

P

A

S

Command Byte

Slave Address

D14 D13 D12 D11 D10

D9

D8

D15

0

0

Acknowledge

from AS1115

Acknowledge

from AS1115

R/W

0

AS1115 Registers

From Master to Slave

From Slave to Master

A

/A

P

A

S

First Data Byte

Second Data Byte

Slave Address

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

D7

Not Acknowledge

from Master

0

1

0

Acknowledge

from Master

Acknowledge

from AS1115

R/W

1

AS1115 Registers

Auto increment

Memory Word

Address

n Bytes

Auto increment

to next address

Stop reading