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AS1117
Datasheet - D e t a i l e d D e s c r i p t i o n
Command Byte
The AS1117 operation, (see Table 7) is determined by a command byte ( see Figure 21 on page 11 ).
Figure 21. Command Byte
MSB
D15
6
D14
5
D13
4
D12
3
D11
2
D10
1
D09
LSB
D08
Figure 22. Command and Single Data Byte Received
From Master to Slave
AS1117 Registers
From Slave to Master
0
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
S
Slave Address
R/W A
Command Byte
A
Data Byte
A
P
1 Byte
Acknowledge
from AS1117
0
Acknowledge
from AS1117
0
Acknowledge
from AS1117
0
Autoincrement
Memory Word
Address
Figure 23. Setting the Pointer to a Address Register to select a Data Register for a Read Operation
From Master to Slave
AS1117 Registers
From Slave to Master
0
D15 D14 D13 D12 D11 D10 D9
D8
S
Slave Address
R/W A
Command Byte
A
P
Acknowledge
from AS1117
0
Acknowledge
from AS1117
0
Figure 24. Reading nBytes from AS1117
Autoincrement
From Master to Slave
Memory Word
Address
Stop reading
From Slave to Master
Acknowledge
from AS1117
0
Acknowledge
from Master
0
Not Acknowledge
from Master
n Bytes
1
S
Slave Address
R/W A
First Data Byte
A
Second Data Byte
/A
P
1
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
AS1117 Registers
Autoincrement
to next address
www.austriamicrosystems.com/LED-Driver-ICs/AS1117
Revision 1.00
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