Datasheet

AD9552 Data Sheet
Rev. E | Page 22 of 32
07806-008
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
Figure 24. Serial Control Port Write—MSB First, 16-Bit Instruction, Two Bytes Data
07806-009
CS
SCLK
SDIO
REGISTER (N) DATA
16-BIT INSTRUCTION HEADER REGISTER (N – 1) DATA
REGISTER (N – 2) DATA
REGISTER (N – 3) DATA
A12W0W1R/W
A11A10
A9
A8 A7
A6 A5
A4 A3 A2 A1 A0
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
Figure 25. Serial Control Port Read—MSB First, 16-Bit Instruction, Four Bytes Data
07806-010
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
H
CS
SCLK
SDIO
Figure 26. Serial Control Port Write—MSB First, 16-Bit Instruction, Timing Measurements
07806-011
DATA BIT N – 1DATA BIT N
CS
SCLK
SDIO
t
DV
Figure 27. Timing Diagram for Serial Control Port Register Read
07806-012
CS
SCLK
DON'T CARE
DON'T CARE
16-BIT INSTRUCTION HEADER REGISTER (N) DATA REGISTER (N + 1) D
ATA
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 28. Serial Control Port Write—LSB First, 16-Bit Instruction, Two Bytes Data
07806-013
SCLK
SDIO
t
HIGH
t
LOW
t
CLK
t
S
t
DS
t
DH
t
H
BIT N BIT N + 1
CS
Figure 29. Serial Control Port Timing—Write