Datasheet

AD9549
Rev. D | Page 46 of 76
Table 11. Serial Control Port, 16-Bit Instruction Word, MSB First
MSB LSB
I15 I14 I13 I12 I11 I10 I9 I8 I7 I6 I5 I4 I3 I2 I1 I0
R/
W
W1 W0 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
06744-053
CSB
SCLK
DON'T CARE
SDIO A12W0W1R/W A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
DON'T CARE
DON'T CARE
DON'T CARE
16-BIT INSTRUCTION HEADER REGISTER (N) DATA REGISTER (N – 1) DATA
Figure 53. Serial Control Port Write—MSB First, 16-Bit Instruction, Two Bytes Data
CS
SCLK
SDIO
SDO
REGISTER (N) DATA
16-BIT INSTRUCTION HEADER REGISTER (N – 1) DATA REGISTER (N – 2) DATA
REGISTER (N – 3) DATA
A12W0W1R/W
A11
A10 A9
A8 A7
A6
A5 A4
A3 A2 A1 A0
DON'T CARE
DON'T CARE
DON'T CARE
DON'T
CARE
D7 D6
D5
D4 D3
D2 D1
D0
D7 D6
D5
D4 D3
D2 D1
D0
D7 D6
D5
D4 D3
D2
D1 D0
D7 D6
D5
D4 D3
D2 D1
D0
06744-060
Figure 54. Serial Control Port Read—MSB First, 16-Bit Instruction, Four Bytes Data
06744-055
t
S
DON'T CARE
DON'T CARE
W1 W0 A12 A11 A10 A9
A8 A7 A6 A5 D4 D3 D2 D1 D0
DON'T CARE
DON'T CARE
R/W
t
DS
t
DH
t
HI
t
LO
t
CLK
t
H
CSB
SCLK
SDIO
Figure 55. Serial Control Port Write—MSB First, 16-Bit Instruction, Timing Measurements
06744-056
DATA BIT N – 1DATA BIT N
CSB
SCLK
SDIO
SDO
t
DV
Figure 56. Timing Diagram for Serial Control Port Register Read
06744-057
CSB
SCLK
DON'T CARE
DON'T CARE
16-BIT INSTRUCTION HEADER REGISTER (N) DATA REGISTER (N + 1) DATA
SDIO
DON'T CARE
DON'T CARE
A0 A1 A2 A3 A4 A5
A6 A7 A8
A9 A10 A11 A12
D1D0R/WW1W0 D2
D3 D4 D5 D6 D7
D0 D1 D2
D3 D4 D5 D6 D7
Figure 57. Serial Control Port Write—LSB First, 16-Bit Instruction, Two Bytes Data