Datasheet

AD9520-0 Data Sheet
Rev. A | Page 56 of 80
CS
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
07213-038
Figure 64. Serial Control Port Write—MSB First, 16-Bit Instruction, Two Bytes of Data
CS
SCLK
SDIO
SDO
REGISTER (N) DATA16-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
07213-039
Figure 65. Serial Control Port Read—MSB First, 16-Bit Instruction, Four Bytes of Data
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
HIGH
t
LOW
t
CLK
t
C
CS
SCLK
SDIO
07213-040
Figure 66. Serial Control Port Write—MSB First, 16-Bit Instruction, Timing Measurements
DATA BIT N – 1DATA BIT N
CS
SCLK
SDIO
SDO
t
DV
07213-041
Figure 67. Timing Diagram for Serial Control Port Register Read
CS
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
07213-042
Figure 68. Serial Control Port Write—LSB First, 16-Bit Instruction, Two Bytes of Data