EVAL-AD5245EBZ Analog Devices Inc, EVAL-AD5245EBZ Datasheet - Page 17

• Manufacturer Part Number: EVAL-AD5245EBZ
• Description: EVALUATION BOARD I.C.
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD5245EBZ

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 8 . Write Mode
S 0 1 0 1 1 0 AD0
Table 9. Read Mode
S
S = START condition
P = STOP condition
A = Acknowledge
X = Don’t care
W = Write
SCL
SDA
0
START BY
MASTER
1
Slave Address Byte
P
SDA
SCL
0
t
1
START BY
MASTER
Slave Address Byte
0
1
S
1
SLAVE ADDRESS BYTE
1
1
SCL
SDA
t
2
0
0
FRAME 1
1
1
0
W
t
AD0
3
1
Figure 46. Reading Data from a Previously Selected RDAC Register in Write Mode
1
A X RS
SLAVE ADDRESS BYTE
0 AD0 R/W
t
8
0
t
8
FRAME 1
1
t
R
9
Figure 44. I
ACK BY
AD5245
1
9
Instruction Byte
SD
A
t
Figure 45. Writing to the RDAC Register
6
0
X
1
D7
AD0
2
X X X X X A D7
t
RS
t
C Interface Detailed Timing Diagram
4
9
Rev. B | Page 17 of 20
INSTRUCTION BYTE
R/W
SD
ACK BY
AD5245
FRAME 2
D6
X
9
X
R = Read
RS = Reset wiper to midscale 0x80
SD = Shutdown connects wiper to B terminal and open circuits
A terminal, but does not change contents of wiper register
D7, D6, D5, D4, D3, D2, D1, D0 = Data Bits
D7
t
1
7
X
D5
D6
X
D5
RDAC REGISTER
X
ACK BY
AD5245
D4
S
D4
FRAME 2
9
t
D6
5
Data Byte
D7
D3
1
D3
D6
D5
D2
t
2
D5
D1
DATA BYTE
D4
FRAME 3
D4
Data Byte
D2
D0
NO ACK
BY MASTER
D3
D3
9
D2
D1
STOP BY
MASTER
D2
D1
D0
ACK BY
AD5245
D1
D0
9
STOP BY
MASTER
P
D0
AD5245
t
10
A
A P
P