AD5254EVAL Analog Devices Inc, AD5254EVAL Datasheet - Page 17

• Manufacturer Part Number: AD5254EVAL
• Description: BOARD EVAL FOR AD5254
• Manufacturer: Analog Devices Inc
• Type: Digital Potentiometerr

Specifications of AD5254EVAL

• Contents: Evaluation Board
• For Use With/related Products: AD5254
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

S = start condition
P = stop condition
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
AD1, AD0 = I
R/ W = read enable bit at logic high; write enable bit at logic low
CMD/ REG = command enable bit at logic high; register access bit at logic low
C3, C2, C1, C0 = command bits
A2, A1, A0 = RDAC/EEMEM register addresses
From Master to Slave
From Slave to Master
S
2
C device address bits, must match with the logic states at Pins AD1, AD0
SLAVE ADDRESS
S
0
1
SLAVE ADDRESS
Figure 29. RDAC Current Read (Restricted to Previously Selected Address Stored in the Register)
0
0 WRITE
1
0
1
S
A
A
D
1
0
RDAC SLAVE ADDRESS
A
D
0
INSTRUCTIONAL AND
1
1 READ
Figure 31. RDAC Quick Command Write (Dummy Write)
1
0
ADDRESS
A
1
Figure 30. RDAC or EEMEM Random Read
1
A
D
1
RDAC_N OR EEMEM_N
A
D
0
0 WRITE
Rev. B | Page 17 of 32
REGISTER DATA
REPEATED START
0
A
A
S
1 CMD
CMD/
REG
(N BYTES + ACKNOWLEDGE)
SLAVE ADDRESS
C
3
C
2
C
1
C
A
0
A
2
RDAC_N + 1 OR EEMEM_N + 1
1 READ
A
1
REGISTER DATA
1
A
0
A
A
P
(N BYTES + ACKNOWLEDGE)
EEMEM DATA
RDAC OR
A
AD5253/AD5254
P
A/A
P